stack: always update window position at transition start
authorMatt Watson <mattdangerw@gmail.com>
Fri, 13 May 2016 07:22:20 +0000 (00:22 -0700)
committerMatt Watson <mattdangerw@gmail.com>
Mon, 16 May 2016 20:53:26 +0000 (13:53 -0700)
commit175cf7e32d39be2b2f1afff9ef7c16dc49b75289
tree84237790507e6386f44e7775c2dadedd097ab41c
parent101da71ee30e53fe0338bc67605a98527277ee56
stack: always update window position at transition start

Sometimes on wayland we're seeing a frame draw before the first tick
callback, where the window position has not yet been updated.

With this change, the window is properly positioned as soon as
gtk_stack_start_transition returns.

https://bugzilla.gnome.org/show_bug.cgi?id=766405
gtk/gtkstack.c