Fix llava model when using text-only prompt

llava/llava.py

@@ -68,11 +68,10 @@ class LlavaModel(nn.Module):
         input_ids: Optional[mx.array] = None,
         pixel_values: Optional[mx.array] = None,
     ):
-        if pixel_values is None:
-            return self.language_model(input_ids)
-
         # Get the input embeddings from the language model
         inputs_embeds = self.language_model.model.embed_tokens(input_ids)
+        if pixel_values is None:
+            return inputs_embeds
 
         # Get the ouptut hidden states from the vision model
         *_, hidden_states = self.vision_tower(