Renamed close_asset to unload_asset

src/GameEngine.c

@@ -204,7 +204,7 @@ AssetID load_asset(const char *path, AssetType type) {
                                      NULL);
 }
 
-void close_asset(AssetID *id) {
+void unload_asset(AssetID *id) {
   if (*id < 0) {
     return;
   }