Unbreak compilation on OS X with --with-regex/--without-wc-funcs. Closes #3149.

diff --git a/mbyte.h b/mbyte.h
index 5691fda5ce0b99491cbe40a92778369ce575456c..bb5601c43109a8a04f400a0d2ed149038ec459dd 100644 (file)
--- a/mbyte.h
+++ b/mbyte.h
@@ -11,6 +11,12 @@
 # endif
 
 # ifndef HAVE_WC_FUNCS
+#ifdef towupper
+# undef towupper
+#endif
+#ifdef towlower
+# undef towlower
+#endif
 #ifdef iswprint
 # undef iswprint
 #endif