xkb: silence a compiler warning

xkb.c: In function ‘ProcXkbSetMap’:
xkb.c:2747:5: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
 2747 |     DeviceIntPtr master = GetMaster(dev, MASTER_KEYBOARD);

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
4 jobs for wip/xkm-no-trailing-slash in 6 minutes and 10 seconds (queued for 1 second)
Status Job ID Name Coverage
  Docker Image
passed #8717602
debian-buster

00:00:10

 
  Build And Test
passed #8717603
autotools

00:05:59

passed #8717604
meson

00:03:15

passed #8717605
meson-noglamor

00:01:55