Fix game crashing on NetworkingInit on Windows. Also add a 32-bit Windows build.

Also stubbed out InitSingleplayer in menu.cpp cuz this client doesn't want to work with servers correctly.

src/helpers/vars.hpp

@@ -1,18 +1,15 @@
 #if INTERFACE
 
-#ifdef WIN32
-#include "external/fix_win32_compatibility.h"
-#endif
 #ifdef Escape
     #undef Escape
 #endif
 #include "glfw_keycodes_to_string.h"
 #include "../PerlinNoise.hpp"
 
-#include <enet/enet.h>
-#ifdef PlaySound
-#undef PlaySound
+#ifdef WIN32
+    #include "external/fix_win32_compatibility.h"
 #endif
+
 #include "raylib.h"
 #include "raymath.h"
 #include <stdint.h>