Silence some gcc warnings
Silence some gcc warnings

cc1: warnings being treated as errors
spice-uri.c: In function ‘spice_uri_parse’:
spice-uri.c:105: error: ‘saveptr’ may be used uninitialized in this
function [-Wuninitialized]
spice-uri.c:105: error: ‘saveptr2’ may be used uninitialized in this
function [-Wuninitialized]

fgouget/spice-gtk,Fantu/spice-gtk,Fantu/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,SPICE/spice-gtk,flexVDI/spice-gtk,SPICE/spice-gtk,fgouget/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,guodong/spice-gtk,fgouget/spice-gtk,Fantu/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,elmarco/spice-gtk,elmarco/spice-gtk,elmarco/spice-gtk,freedesktop-unofficial-mirror/spice__spice-gtk,SPICE/spice-gtk,flexVDI/spice-gtk,Fantu/spice-gtk,guodong/spice-gtk,elmarco/spice-gtk,guodong/spice-gtk,guodong/spice-gtk,SPICE/spice-gtk