Clean up RndItem

Source/items.cpp

@@ -2601,11 +2601,19 @@ int RndItem(int m)
 
 	ri = 0;
 	for (i = 0; AllItemsList[i].iLoc != ILOC_INVALID; i++) {
-		if (AllItemsList[i].iRnd == IDROP_DOUBLE && monster[m].mLevel >= AllItemsList[i].iMinMLvl) {
+		if (AllItemsList[i].iRnd == IDROP_DOUBLE && monster[m].mLevel >= AllItemsList[i].iMinMLvl
+#ifdef HELLFIRE
+			&& ri < 512
+#endif
+		) {
 			ril[ri] = i;
 			ri++;
 		}
-		if (AllItemsList[i].iRnd && monster[m].mLevel >= AllItemsList[i].iMinMLvl) {
+		if (AllItemsList[i].iRnd && monster[m].mLevel >= AllItemsList[i].iMinMLvl
+#ifdef HELLFIRE
+			&& ri < 512
+#endif
+		) {
 			ril[ri] = i;
 			ri++;
 		}