typos (#989)

Source/diablo.cpp

@@ -1559,7 +1559,7 @@ static void UpdateMonsterLights()
 	for (int i = 0; i < nummonsters; i++) {
 		MonsterStruct *mon = &monster[monstactive[i]];
 		if (mon->mlid != NO_LIGHT) {
-			if (mon->mlid == plr[myplr]._plid) { // Fix old save games where some monsters hade 0 instea of NO_LIGHT
+			if (mon->mlid == plr[myplr]._plid) { // Fix old saves where some monsters had 0 instead of NO_LIGHT
 				mon->mlid = NO_LIGHT;
 				continue;
 			}