Don't do arithmetic on void * type, use uint8_t instead
Don't do arithmetic on void * type, use uint8_t instead

Arithmetic on void * types is non-portable & trivially avoided

* server/dispatcher.c: Use uint8_t for arithmetic

Signed-off-by: Daniel P. Berrange <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

fgouget/spice,SPICE/spice,dezelin/spice,ya-mouse/spice,alon/spice-server,fgouget/spice,fgouget/spice,Fantu/spice,ya-mouse/spice,fgouget/spice,alon/spice-server,mathslinux/spice,elmarco/spice,dezelin/spice,elmarco/spice,freedesktop-unofficial-mirror/spice__spice,freedesktop-unofficial-mirror/spice__spice,freedesktop-unofficial-mirror/spice__spice,SPICE/spice,alon/spice-server,Fantu/spice,Fantu/spice,dezelin/spice,mathslinux/spice,SPICE/spice,mathslinux/spice,mathslinux/spice,alon/spice-server,ya-mouse/spice,mathslinux/spice,elmarco/spice,freedesktop-unofficial-mirror/spice__spice,alon/spice-server,elmarco/spice,dezelin/spice,Fantu/spice,dezelin/spice,elmarco/spice,freedesktop-unofficial-mirror/spice__spice