build : fix most gcc and clang warnings (#2861)

* fix most gcc and clang warnings

* baby-llama : remove commented opt_params_adam

* fix some MinGW warnings

* fix more MinGW warnings

1 files changed, 2 insertions, 2 deletions

diff --git a/llama.cpp b/llama.cpp
index 98a5da96..5ca11923 100644
--- a/llama.cpp
+++ b/llama.cpp
@@ -3600,7 +3600,7 @@ static void llama_grammar_advance_stack(
         std::vector<std::vector<const llama_grammar_element *>> & new_stacks) {
 
     if (stack.empty()) {
-        new_stacks.push_back(stack);
+        new_stacks.emplace_back(stack);
         return;
     }
 
@@ -3637,7 +3637,7 @@ static void llama_grammar_advance_stack(
         }
         case LLAMA_GRETYPE_CHAR:
         case LLAMA_GRETYPE_CHAR_NOT:
-            new_stacks.push_back(stack);
+            new_stacks.emplace_back(stack);
             break;
         default:
             // end of alternate (LLAMA_GRETYPE_END, LLAMA_GRETYPE_ALT) or middle of char range