fix typo

Author: ngxson

convert_hf_to_gguf.py

@@ -1207,7 +1207,7 @@ def set_gguf_parameters(self):
             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):