rcextensions: improved messaging on rcextensions load fail

rhodecode/lib/utils.py

@@ -634,9 +634,11 b' def load_rcextensions(root_path):'
 
     path = os.path.join(root_path)
     sys.path.append(path)
+
     try:
         rcextensions = __import__('rcextensions')
     except ImportError:
+        if os.path.isdir(os.path.join(path, 'rcextensions')):
         log.warn('Unable to load rcextensions from %s', path)
         rcextensions = None