Reverted resource references for combine_something, you can't use tool_image here, because on MSW that only works for .bmps'

Added dependency stuff to invalidate Choice images;
Fixed 'duplicate' in symbol editor

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@197 0fc631ac-6414-0410-93d0-97cfa31319b6

src/script/image.cpp

@@ -264,7 +264,9 @@ SCRIPT_FUNCTION(symbol_variation) {
 		throw ScriptError(_("Variation of symbol not found ('") + variation + _("')"));
 	} else {
 //		SCRIPT_RETURN(last_update_age() >= value->filename.last_update_age);
-		SCRIPT_RETURN(true);
+		SCRIPT_RETURN(last_update_age() > 1); // the symbol was created/loaded after program start,
+		                                      // don't use cached images
+//		SCRIPT_RETURN(true);
 	}
 }