Allow building using:
$ CFLAGS=-Werror sh autogen.sh --prefix=/xxx
AC_MSG_CHECKING([if <X11/extensions/XIproto.h> is needed for xReply])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <X11/Xlibint.h>]],
- [[xReply *rep;]])],
+ [[xReply *rep = NULL;
+ rep = rep;]])],
[AC_MSG_RESULT([no])],
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <X11/extensions/XIproto.h>
#include <X11/Xlibint.h>]],
- [[xReply *rep;]])],
+ [[xReply *rep = NULL;
+ rep = rep;]])],
[AC_MSG_RESULT([yes])
AC_DEFINE([NEED_XIPROTO_H_FOR_XREPLY], [1],
[Define if <X11/extensions/XIproto.h> needed for xReply])],