switch from Copy-list-initialization to Direct-list-initialization

Author: aumfer

tools/server/server.cpp

@@ -1862,7 +1862,7 @@ struct server_context {
 
     llama_context_params cparams_dft;
 
-    llama_batch batch = {};
+    llama_batch batch {};
 
     bool clean_kv_cache = true;
     bool add_bos_token  = true;