fix: Handle setting LoRA adapter when none already set

Author: richdougherty

llama_cpp/llama.py

@@ -637,6 +637,8 @@ def set_lora_adapter_scale(self, lora_path: str, scale: float, *, load_if_needed
             # Set scale in context
             self._ctx.lora_adapter_set(lora_adapter, scale)
 
+        if self.lora_adapters is None:
+            self.lora_adapters = {}
         self.lora_adapters[lora_path] = scale
         self._lora_adapters_active = tuple(sorted(
             filter(lambda path_scale: path_scale[1] != 0.0, self.lora_adapters.items())