fix(GameEvent): add forward declaration for OnScriptLoaded

ScanLoadedScripts (line 270) calls OnScriptLoaded which is defined later
(line 537). Add a forward declaration to fix the compilation error.

Author: doyaGu

modules/BML_GameEvent/src/EventMod.cpp

@@ -267,6 +267,8 @@ static bool IsScriptBehavior(CKObject *object) {
 
 namespace BML_GameEvent {
 
+static void OnScriptLoaded(const char *filename, CKBehavior *script);
+
 static int ScanLoadedScripts(CKContext *ctx) {
     if (!ctx || !s_Services) {
         return 0;