srt: Fix warning error

gstsrt.c: In function ‘gst_srt_client_connect_full’:
gstsrt.c:151:6: error: ‘sock’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
   if (sock != SRT_INVALID_SOCK) {

https://bugzilla.gnome.org/show_bug.cgi?id=791302
1 file changed