[hellfire] Fix monsters being unable to hit at close range

This seams to have been done to better align the magic missile fired by
the bonedeamon, but for all other monsters the alignment is less ideal
and they become unable to hit there enemy at close range.

Source/monster.cpp

@@ -1588,21 +1588,17 @@ bool MonaterRangedAttack(int i)
 	assert(monster.MData != nullptr);
 
 	if (monster.AnimInfo.CurrentFrame == monster.MData->mAFNum) {
-		if (monster._mVar1 != -1) {
+		const auto &missileType = static_cast<missile_id>(monster._mVar1);
+		if (missileType != MIS_NULL) {
 			int multimissiles = 1;
-			if (monster._mVar1 == MIS_CBOLT)
+			if (missileType == MIS_CBOLT)
 				multimissiles = 3;
 			for (int mi = 0; mi < multimissiles; mi++) {
-				Point sourcePosition = monster.position.tile;
-				if (gbIsHellfire) {
-					sourcePosition += monster._mdir;
-				}
-
 				AddMissile(
-				    sourcePosition,
+				    monster.position.tile,
 				    monster.enemyPosition,
 				    monster._mdir,
-				    static_cast<missile_id>(monster._mVar1),
+				    missileType,
 				    TARGET_PLAYERS,
 				    i,
 				    monster._mVar2,
@@ -1628,13 +1624,8 @@ bool MonsterRangedSpecialAttack(int i)
 	assert(monster.MData != nullptr);
 
 	if (monster.AnimInfo.CurrentFrame == monster.MData->mAFNum2 && monster.AnimInfo.TickCounterOfCurrentFrame == 0) {
-		Point sourcePosition = monster.position.tile;
-		if (gbIsHellfire) {
-			sourcePosition += monster._mdir;
-		}
-
 		AddMissile(
-		    sourcePosition,
+		    monster.position.tile,
 		    monster.enemyPosition,
 		    monster._mdir,
 		    static_cast<missile_id>(monster._mVar1),