chres: Unbreak scale factor setting after aa15bf81e4

Author: https://github.com/nico
Commit: https://github.com/SerenityOS/serenity/commit/8cf348c14c2
Pull-request: https://github.com/SerenityOS/serenity/pull/8600

Userland/Utilities/chres.cpp

@@ -13,7 +13,7 @@ int main(int argc, char** argv)
     int screen = -1;
     int width = -1;
     int height = -1;
-    int scale = 1;
+    int scale = -1;
 
     Core::ArgsParser args_parser;
     args_parser.set_general_help("Change the screen resolution.");
@@ -33,6 +33,8 @@ int main(int argc, char** argv)
     }
     auto& main_screen = screen_layout.screens[screen];
     main_screen.resolution = { width, height };
+    if (scale != -1)
+        main_screen.scale_factor = scale;
     auto set_result = GUI::WindowServerConnection::the().set_screen_layout(screen_layout, true);
     if (!set_result.success()) {
         warnln("failed to set resolution: {}", set_result.error_msg());