maintainer-feedback requested: [Bug 283486] x11/libX11: Failed to build using GCC 13 due to '-Werror=maybe-uninitialized'

Bugzilla Automation <bugzilla@FreeBSD.org> has asked freebsd-x11 (Nobody)
<x11@FreeBSD.org> for maintainer-feedback:
Bug 283486: x11/libX11: Failed to build using GCC 13 due to
'-Werror=maybe-uninitialized'
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=283486



--- Description ---
Building with GCC 13.3 (lang/gcc13 13.3.0) fails with:

../include/X11/Xlibint.h:680:34: error: 'nbytes' may be used uninitialized
[-Werror=maybe-uninitialized]
  680 | #define _XRead16(dpy, data, len) _XRead((dpy), (char *)(data), (len))
      | 				 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Font.c:283:9: note: in expansion of macro '_XRead16'
  283 | 	_XRead16 (dpy, (char *)fs->per_char, nbytes);
      | 	^~~~~~~~
Font.c:190:19: note: 'nbytes' was declared here
  190 |     unsigned long nbytes;
      | 		  ^~~~~~