user32: Disable assert() for the mingw build since mingw gets confused trying to import MessageBoxA.
diff --git a/dlls/user32/user_private.h b/dlls/user32/user_private.h
index f1a6585..1ff6ef4 100644
--- a/dlls/user32/user_private.h
+++ b/dlls/user32/user_private.h
@@ -354,4 +354,10 @@
extern void CURSORICON_FreeModuleIcons( HMODULE16 hModule ) DECLSPEC_HIDDEN;
+/* Mingw's assert() imports MessageBoxA and gets confused by user32 exporting it */
+#ifdef __MINGW32__
+#undef assert
+#define assert(expr) ((void)0)
+#endif
+
#endif /* __WINE_USER_PRIVATE_H */