Add asset_cg_exists function

include/asset_manager.h

@@ -42,6 +42,7 @@ struct archive_data *asset_get(enum asset_type type, int no);
 // FIXME: CG code should be refactored to read from buffer only, not archive,
 //        then caller can just use asset_get and cg_load
 struct cg *asset_cg_load(int no);
+bool asset_cg_exists(int no);
 bool asset_cg_get_metrics(int no, struct cg_metrics *metrics);
 void asset_cg_index_init(void);
 

src/asset_manager.c

@@ -279,6 +279,15 @@ struct cg *asset_cg_load(int no)
 	return cg_load(archives[ASSET_CG], no - 1);
 }
 
+bool asset_cg_exists(int no)
+{
+	if (!archives[ASSET_CG])
+		return false;
+	if (!(no = cg_translate_index(no)))
+		return false;
+	return true;
+}
+
 bool asset_cg_get_metrics(int no, struct cg_metrics *metrics)
 {
 	if (!archives[ASSET_CG])

src/hll/SACT2.c

@@ -688,7 +688,7 @@ int sact_Key_IsDown(int keycode)
 
 int sact_CG_IsExist(int cg_no)
 {
-	return asset_exists(ASSET_CG, cg_no - 1);
+	return asset_cg_exists(cg_no);
 }
 
 //int  SACT2_CSV_Load(struct string *filename);