Revert "Project modernization (#630)"

This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.

This reverts commit a9be52c41a.

Minecraft.Client/PauseScreen.cpp

@@ -54,12 +54,12 @@ void PauseScreen::buttonClicked(Button button)
             minecraft->level->disconnect();
         }
 
-        minecraft->setLevel(nullptr);
+        minecraft->setLevel(NULL);
         minecraft->setScreen(new TitleScreen());
     }
     if (button.id == 4)
 	{
-        minecraft->setScreen(nullptr);
+        minecraft->setScreen(NULL);
  //       minecraft->grabMouse();		// 4J - removed
     }
 
@@ -88,7 +88,7 @@ void PauseScreen::render(int xm, int ym, float a)
 	{
         float col = ((visibleTime % 10) + a) / 10.0f;
         col = Mth::sin(col * PI * 2) * 0.2f + 0.8f;
-        int br = static_cast<int>(255 * col);
+        int br = (int) (255 * col);
 
         drawString(font, L"Saving level..", 8, height - 16, br << 16 | br << 8 | br);
     }