+#ifdef G_DISABLE_CAST_CHECKS
+/* This is true for debug no and minimum */
+#define gtk_internal_return_if_fail(__expr) G_STMT_START{ (void)0; }G_STMT_END
+#define gtk_internal_return_val_if_fail(__expr, __val) G_STMT_START{ (void)0; }G_STMT_END
+#else
+/* This is true for debug yes */
+#define gtk_internal_return_if_fail(__expr) g_return_if_fail(__expr)
+#define gtk_internal_return_val_if_fail(__expr, __val) g_return_val_if_fail(__expr, __val)
+#endif
+