include wctype.h to make gcc happy
diff --git a/src/FTLayout/FTSimpleLayout.cpp b/src/FTLayout/FTSimpleLayout.cpp
index 9b090f7..505c813 100644
--- a/src/FTLayout/FTSimpleLayout.cpp
+++ b/src/FTLayout/FTSimpleLayout.cpp
@@ -26,6 +26,7 @@
#include "config.h"
#include <ctype.h>
+#include <wctype.h>
#include "FTInternals.h"
#include "FTUnicode.h"