added log warning for unsupported file extension for music stream (#1176)

* added log warning for unsupported file extension for music stream

* updated error log message for music stream when file format isn't supported

src/raudio.c

@@ -1139,6 +1139,7 @@ Music LoadMusicStream(const char *fileName)
         }
     }
 #endif
+    else TRACELOG(LOG_WARNING, "STREAM: [%s] Fileformat not supported", fileName);
     
     if (!musicLoaded)
     {