Fix CD ROM entries appearing multiple times

SheepShaver/src/MacOSX/Launcher/VMSettingsController.mm

@@ -414,9 +414,12 @@ static NSString *makeRelativeIfNecessary(NSString *path)
     if(![p hasPrefix:@"/dev/"]) {
       PrefsRemoveItem("cdrom", index);
     }
-	  
+	else {
+		// only increase the index if the current entry has not been deleted
+		// if it has been deleted, the next entry is on the current entrys index
 		index++;
 	}
+  }
 
   // Write all disks
   for (int i = 0; i < [diskArray count]; i++) {