adress #508 - fix postfxmanager default initialization

Templates/BaseGame/game/core/postFX/Core_PostFX.tscript

@@ -6,7 +6,7 @@ function Core_PostFX::onCreate(%this)
    exec("./scripts/postFx." @ $TorqueScriptFileExtension);
    
    //Load the default config
-   loadPresetHandler("./scripts/default.postfxpreset." @ $TorqueScriptFileExtension);
+   PostFXManager.loadPresetHandler("./scripts/default.postfxpreset." @ $TorqueScriptFileExtension);
 }
 
 function Core_PostFX::onDestroy(%this)