!fixup Parameter handles

Author: grandchild

avs/vis_avs/effect_library.cpp

@@ -42,7 +42,8 @@ static std::unordered_map<std::string, uint32_t> find_duplicate_effect_names(
 
 static bool check_handle_collision(AVS_Parameter_Handle handle,
                                    const std::string& path) {
-    if (auto other = g_param_map.find(handle); other != g_param_map.end()) {
+    auto other = g_param_map.find(handle);
+    if (other != g_param_map.end()) {
         // TODO[feature]: Find out effect/path for other parameter, so that the error
         //                message becomes more actionable.
         log_err(