sokol_app.h: fix whitespace

sokol_app.h

@@ -6865,7 +6865,7 @@ _SOKOL_PRIVATE void _sapp_wgl_create_context(void) {
         WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB | WGL_CONTEXT_DEBUG_BIT_ARB,
 #else
         WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
-#endif        
+#endif
         WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
         0, 0
     };