convert : fix qwen omni conversion (#13859)

* convert : fix qwen omni conversion

* fix typo

convert_hf_to_gguf.py

@@ -423,19 +423,19 @@ class ModelBase:
         try:
             # for security reason, we don't allow loading remote code by default
             # if a model need remote code, we will fallback to config.json
-            return AutoConfig.from_pretrained(dir_model, trust_remote_code=False).to_dict()
+            config = AutoConfig.from_pretrained(dir_model, trust_remote_code=False).to_dict()
         except Exception as e:
             logger.warning(f"Failed to load model config from {dir_model}: {e}")
             logger.warning("Trying to load config.json instead")
             with open(dir_model / "config.json", "r", encoding="utf-8") as f:
                 config = json.load(f)
-                if "llm_config" in config:
-                    # rename for InternVL
-                    config["text_config"] = config["llm_config"]
-                if "thinker_config" in config:
-                    # rename for Qwen2.5-Omni
-                    config["text_config"] = config["thinker_config"]["text_config"]
-                return config
+        if "llm_config" in config:
+            # rename for InternVL
+            config["text_config"] = config["llm_config"]
+        if "thinker_config" in config:
+            # rename for Qwen2.5-Omni
+            config["text_config"] = config["thinker_config"]["text_config"]
+        return config
 
     @classmethod
     def register(cls, *names: str) -> Callable[[AnyModel], AnyModel]:
@@ -1207,7 +1207,7 @@ class MmprojModel(ModelBase):
             self.gguf_writer.add_audio_block_count(self.find_aparam(self.n_block_keys))
             self.gguf_writer.add_audio_head_count(self.find_aparam(["num_attention_heads"]))
 
-        else:
+        if not self.has_vision_encoder and not self.has_audio_encoder:
             raise ValueError("MmprojModel must have either vision or audio encoder")
 
     def write_vocab(self):