Fix a gcc warning
Fix a gcc warning

warning: suggest explicit braces to avoid ambiguous 'else'

freedesktop-unofficial-mirror/spice__spice-common,elmarco/spice-common,SPICE/spice-common,Fantu/spice-common,fgouget/spice-common,SPICE/spice-common,freedesktop-unofficial-mirror/spice__spice-common,Fantu/spice-common,fgouget/spice-common,freedesktop-unofficial-mirror/spice__spice-common,Fantu/spice-common,fgouget/spice-common,elmarco/spice-common,elmarco/spice-common,Fantu/spice-common,fgouget/spice-common,SPICE/spice-common,freedesktop-unofficial-mirror/spice__spice-common,elmarco/spice-common