fix(diffusers): consider options only in form of key/value (#5277)

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

backend/python/diffusers/backend.py

@@ -168,9 +168,13 @@ class BackendServicer(backend_pb2_grpc.BackendServicer):
             # We are storing all the options in a dict so we can use it later when
             # generating the images
             for opt in options:
+                if ":" not in opt:
+                    continue
                 key, value = opt.split(":")
                 self.options[key] = value
 
+            print(f"Options: {self.options}", file=sys.stderr)
+
             local = False
             modelFile = request.Model