Adding some assertions

src/file/loaders/font.h

@@ -19,7 +19,7 @@
  * @return A pointer to the asset manager item for tracking.
  */
 assetmanageritem_t * assetManagerLoadFont(
-  assetmanager_t *manager, assetmanagerowner_t owner, char *fileName
+  assetmanager_t *manager, assetmanagerowner_t owner, const char fileName[]
 );
 
 bool _assetManagerLoaderFontAsync(assetmanageritem_t *item);