Fix MinGW and OS/2 bustage from bug 262218 patch suggested by mkaply r=me sr=darin

xpfe/bootstrap/nsNativeAppSupportWin.cpp

@@ -88,6 +88,7 @@
 #include <stdio.h>
 #include <io.h>
 #include <fcntl.h>
+#include <ctype.h>
 
 #define TURBO_NAVIGATOR 1
 #define TURBO_MAIL 2