diff --git a/.travis.yml b/.travis.yml
index 517aa12df..8eeb3810e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,8 @@ language: cpp
 os:
   - linux
   - osx
+  
+osx_image: xcode10.3
 
 notifications:
   email:
@@ -15,7 +17,6 @@ addons:
   homebrew:
     packages:
       - mingw-w64
-    update: true
 
 env:
   - MAKE_BUILD=make
diff --git a/Source/automap.cpp b/Source/automap.cpp
index e4454f508..e9907cf9e 100644
--- a/Source/automap.cpp
+++ b/Source/automap.cpp
@@ -71,24 +71,21 @@ void InitAutomap()
 	switch (leveltype) {
 	case DTYPE_CATHEDRAL:
 		pAFile = LoadFileInMem("Levels\\L1Data\\L1.AMP", &dwTiles);
-		dwTiles >>= 1;
 		break;
 	case DTYPE_CATACOMBS:
 		pAFile = LoadFileInMem("Levels\\L2Data\\L2.AMP", &dwTiles);
-		dwTiles >>= 1;
 		break;
 	case DTYPE_CAVES:
 		pAFile = LoadFileInMem("Levels\\L3Data\\L3.AMP", &dwTiles);
-		dwTiles >>= 1;
 		break;
 	case DTYPE_HELL:
 		pAFile = LoadFileInMem("Levels\\L4Data\\L4.AMP", &dwTiles);
-		dwTiles >>= 1;
 		break;
 	default:
 		return;
 	}
 
+	dwTiles >>= 1;
 	pTmp = pAFile;
 
 	for (i = 1; i <= dwTiles; i++) {
diff --git a/Source/engine.cpp b/Source/engine.cpp
index 35ae01520..b5fd3d4d4 100644
--- a/Source/engine.cpp
+++ b/Source/engine.cpp
@@ -2301,12 +2301,13 @@ int GetDirection(int x1, int y1, int x2, int y2)
 		if (2 * my < mx)
 			return DIR_SE;
 	} else {
-		ny = -mx;
 		if (my >= 0) {
+			ny = -mx;
 			md = DIR_W;
 			if (2 * ny < my)
 				md = DIR_SW;
 		} else {
+			ny = -mx;
 			my = -my;
 			md = DIR_N;
 			if (2 * ny < my)
diff --git a/Source/monster.cpp b/Source/monster.cpp
index f4b27792d..7bcb4f409 100644
--- a/Source/monster.cpp
+++ b/Source/monster.cpp
@@ -361,34 +361,22 @@ void InitMonsterGFX(int monst)
 		MissileFileFlag |= 2;
 		LoadMissileGFX(MFILE_THINLGHT);
 	}
-	if (mtype == MT_SUCCUBUS) {
-		if (MissileFileFlag & 4)
-			return;
-
+	if (mtype == MT_SUCCUBUS && !(MissileFileFlag & 4)) {
 		MissileFileFlag |= 4;
 		LoadMissileGFX(MFILE_FLARE);
 		LoadMissileGFX(MFILE_FLAREEXP);
 	}
-	if (mtype == MT_SNOWWICH) {
-		if (MissileFileFlag & 0x20)
-			return;
-
+	if (mtype == MT_SNOWWICH && !(MissileFileFlag & 0x20)) {
 		MissileFileFlag |= 0x20;
 		LoadMissileGFX(MFILE_SCUBMISB);
 		LoadMissileGFX(MFILE_SCBSEXPB);
 	}
-	if (mtype == MT_HLSPWN) {
-		if (MissileFileFlag & 0x40)
-			return;
-
+	if (mtype == MT_HLSPWN && !(MissileFileFlag & 0x40)) {
 		MissileFileFlag |= 0x40;
 		LoadMissileGFX(MFILE_SCUBMISD);
 		LoadMissileGFX(MFILE_SCBSEXPD);
 	}
-	if (mtype == MT_SOLBRNR) {
-		if (MissileFileFlag & 0x80)
-			return;
-
+	if (mtype == MT_SOLBRNR && !(MissileFileFlag & 0x80)) {
 		MissileFileFlag |= 0x80;
 		LoadMissileGFX(MFILE_SCUBMISC);
 		LoadMissileGFX(MFILE_SCBSEXPC);
diff --git a/Source/spells.cpp b/Source/spells.cpp
index aea7f5d16..bb1ba8eb1 100644
--- a/Source/spells.cpp
+++ b/Source/spells.cpp
@@ -138,7 +138,7 @@ void CastSpell(int id, int spl, int sx, int sy, int dx, int dy, int caster, int
 	if (spelldata[spl].sMissiles[0] == MIS_CBOLT) {
 		UseMana(id, SPL_CBOLT);
 
-		for (i = 0; i < (spllvl >> 1) + 3; i++) {
+		for (i = (spllvl >> 1) + 3; i > 0; i--) {
 			AddMissile(sx, sy, dx, dy, dir, MIS_CBOLT, caster, id, 0, spllvl);
 		}
 	}
diff --git a/Source/stores.cpp b/Source/stores.cpp
index d61853247..23b524cf5 100644
--- a/Source/stores.cpp
+++ b/Source/stores.cpp
@@ -199,16 +199,17 @@ void PrintSString(int x, int y, BOOL cjustflag, char *str, char col, int val)
 
 void DrawSLine(int y)
 {
-	int xy, yy, width, line;
+	int xy, yy, width, line, sy;
 
+	sy = SStringY[y];
 	if (stextsize == 1) {
 		xy = SCREENXY(26, 25);
-		yy = PitchTbl[SStringY[y] + 198] + 26 + 64;
+		yy = PitchTbl[sy + 198] + 26 + 64;
 		width = 586 / 4;
 		line = BUFFER_WIDTH - 586;
 	} else {
 		xy = SCREENXY(346, 25);
-		yy = PitchTbl[SStringY[y] + 198] + 346 + 64;
+		yy = PitchTbl[sy + 198] + 346 + 64;
 		width = 266 / 4;
 		line = BUFFER_WIDTH - 266;
 	}
@@ -330,9 +331,9 @@ void StoreAutoPlace()
 	int i, w, h, idx;
 
 	SetICursor(plr[myplr].HoldItem._iCurs + CURSOR_FIRSTITEM);
-	done = FALSE;
 	w = icursW28;
 	h = icursH28;
+	done = FALSE;
 	if (w == 1 && h == 1) {
 		idx = plr[myplr].HoldItem.IDidx;
 		if (plr[myplr].HoldItem._iStatFlag && AllItemsList[idx].iUsable) {
@@ -453,6 +454,8 @@ void S_ScrollSBuy(int idx)
 void PrintStoreItem(ItemStruct *x, int l, char iclr)
 {
 	char sstr[128];
+	char str, dex;
+	BYTE mag;
 
 	sstr[0] = '\0';
 	if (x->_iIdentified) {
@@ -492,7 +495,10 @@ void PrintStoreItem(ItemStruct *x, int l, char iclr)
 	}
 	if (!x->_itype)
 		sstr[0] = '\0';
-	if (!(x->_iMinStr + x->_iMinMag + x->_iMinDex)) {
+	str = x->_iMinStr;
+	dex = x->_iMinDex;
+	mag = x->_iMinMag;
+	if (!(str + mag + dex)) {
 		strcat(sstr, "No required attributes");
 	} else {
 		strcpy(tempstr, "Required:");
@@ -504,10 +510,10 @@ void PrintStoreItem(ItemStruct *x, int l, char iclr)
 			sprintf(tempstr, "%s %i Dex", tempstr, x->_iMinDex);
 		strcat(sstr, tempstr);
 	}
-	AddSText(40, l, 0, sstr, iclr, 0);
+	AddSText(40, l++, 0, sstr, iclr, 0);
 	if (x->_iMagical == ITEM_QUALITY_UNIQUE) {
 		if (x->_iIdentified)
-			AddSText(40, l + 1, 0, "Unique Item", iclr, 0);
+			AddSText(40, l, 0, "Unique Item", iclr, 0);
 	}
 }
 
diff --git a/Source/towners.cpp b/Source/towners.cpp
index e04e694dc..873fceaca 100644
--- a/Source/towners.cpp
+++ b/Source/towners.cpp
@@ -812,11 +812,11 @@ void TalkToTowner(int p, int t)
 			towner[t]._tVar1 = p;
 			quests[QTYPE_BUTCH]._qvar1 = 1;
 #ifndef SPAWN
-			if (plr[p]._pClass == 0 && !effect_is_playing(PS_WARR8)) {
+			if (plr[p]._pClass == PC_WARRIOR && !effect_is_playing(PS_WARR8)) {
 				PlaySFX(PS_WARR8);
-			} else if (plr[p]._pClass == 1 && !effect_is_playing(PS_ROGUE8)) {
+			} else if (plr[p]._pClass == PC_ROGUE && !effect_is_playing(PS_ROGUE8)) {
 				PlaySFX(PS_ROGUE8);
-			} else if (plr[p]._pClass == 2 && !effect_is_playing(PS_MAGE8)) {
+			} else if (plr[p]._pClass == PC_SORCERER && !effect_is_playing(PS_MAGE8)) {
 				PlaySFX(PS_MAGE8);
 			}
 #endif