Model: Set vision load to False by default

Mistake in unwrapping. Vision should be false to allow normal model
loading when the flag isn't provided.

Signed-off-by: kingbri <bdashore3@proton.me>

backends/exllamav2/model.py

@@ -152,7 +152,7 @@ class ExllamaV2Container:
         kwargs = await self.set_model_overrides(**kwargs)
 
         # Set vision state
-        self.use_vision = unwrap(kwargs.get("vision"), True)
+        self.use_vision = unwrap(kwargs.get("vision"), False)
 
         # Prepare the draft model config if necessary
         draft_args = unwrap(kwargs.get("draft_model"), {})