Build fix

Change-Id: I33db5c70b579aa65c9659e9ddddad77a5ec12ecc
Reviewed-on: https://gerrit.libreoffice.org/46127Reviewed-by: Szymon Kłos <szymon.klos@collabora.com>
Tested-by: Szymon Kłos <szymon.klos@collabora.com>

include/vcl/cursor.hxx

@@ -24,6 +24,7 @@
 #include <tools/link.hxx>
 #include <vcl/dllapi.h>
 #include <vcl/vclptr.hxx>
+#include <rtl/ustring.hxx>
 
 class Timer;
 struct ImplCursorData;