update file library warnings

src/logic/scripting/lua/libs/libfile.cpp

@@ -57,11 +57,12 @@ static fs::path get_writeable_path(lua::State* L) {
     fs::path path = resolve_path(rawpath);
     auto entryPoint = rawpath.substr(0, rawpath.find(':'));
     if (writeable_entry_points.find(entryPoint) == writeable_entry_points.end()) {
-        lua::emit_event(L, "core:warning", [=](auto L) {
+        if (lua::getglobal(L, "__vc_warning")) {
             lua::pushstring(L, "writing to read-only entry point");
             lua::pushstring(L, entryPoint);
-            return 2;
-        });
+            lua::pushinteger(L, 1);
+            lua::call_nothrow(L, 3);
+        }
     }
     return path;
 }