XvQueryAdaptors: avoid NULL deref if length is 0, but num_adaptors is notHEADmaster

Found by gcc 14.1:
Xv.c: In function ‘XvQueryAdaptors’:
Xv.c:222:31: warning: dereference of NULL ‘<unknown>’ [CWE-476]
 [-Wanalyzer-null-dereference]
  222 |         pa->type = (char) u.pa->type;
      |                           ~~~~^~~~~~

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/lib/libxv/-/merge_requests/7>

0 files changed, 0 insertions, 0 deletions