improve lag because of cc_2x2_white_image

loader/src/cocos2d-ext/CCFileUtils.cpp

@@ -93,4 +93,18 @@ struct FileUtilsUpdatePaths : Modify<FileUtilsUpdatePaths, CCFileUtils> {
         }
         return ret;
     }
+
+    gd::string fullPathForFilename(const char* filename, bool unk) override {
+        using namespace std::string_literals;
+        using namespace std::string_view_literals;
+
+        // this filename in particular is never cached because its not actually present anywhere.
+        // this is only an issue because cocos itself requests the full path for this in CCSprite,
+        // and with a lot of search paths (specially ones added by geode), this can cause a significant amount of lag.
+        if (filename == "cc_2x2_white_image"sv) {
+            return "cc_2x2_white_image"s;
+        }
+
+        return CCFileUtils::fullPathForFilename(filename, unk);
+    }
 };