GtkTimeline: Wrap around the progress correctly when looping
GtkTimeline: Wrap around the progress correctly when looping

When we have a looping animation for something like an angle,
we need to make sure that the distance we go past 1.0 becomes
the starting distance for the next frame. This prevents a
stutter at the loop position.

https://bugzilla.gnome.org/show_bug.cgi?id=685460

msteinert/gtk,Adamovskiy/gtk,Lyude/gtk-,chergert/gtk,grubersjoe/adwaita,bratsche/gtk-,jessevdk/gtk,grubersjoe/adwaita,alexlarsson/gtk,alexlarsson/gtk,jigpu/gtk,Adamovskiy/gtk,Sidnioulz/SandboxGtk,jessevdk/gtk,grubersjoe/adwaita,chergert/gtk,Distrotech/gtk2,alexlarsson/gtk,ebassi/gtk,Adamovskiy/gtk,Distrotech/gtk2,grubersjoe/adwaita,davidgumberg/gtk,chergert/gtk,jigpu/gtk,jigpu/gtk,grubersjoe/adwaita,chergert/gtk,Distrotech/gtk2,Lyude/gtk-,Sidnioulz/SandboxGtk,davidgumberg/gtk,chergert/gtk,davidgumberg/gtk,alexlarsson/gtk,alexlarsson/gtk,Adamovskiy/gtk,davidgumberg/gtk,jessevdk/gtk,Sidnioulz/SandboxGtk,jessevdk/gtk,ahodesuka/gtk,jadahl/gtk,jessevdk/gtk,grubersjoe/adwaita,alexlarsson/gtk,Lyude/gtk-,msteinert/gtk,davidt/gtk,jigpu/gtk,Sidnioulz/SandboxGtk,Lyude/gtk-,jadahl/gtk,chergert/gtk,davidt/gtk,jigpu/gtk,davidt/gtk,msteinert/gtk,davidgumberg/gtk,davidgumberg/gtk,msteinert/gtk,ebassi/gtk,jadahl/gtk,Lyude/gtk-,jadahl/gtk,ahodesuka/gtk,Lyude/gtk-,grubersjoe/adwaita,jadahl/gtk,jigpu/gtk,Lyude/gtk-,ebassi/gtk,ahodesuka/gtk,jadahl/gtk,ebassi/gtk,bratsche/gtk-,Sidnioulz/SandboxGtk,ahodesuka/gtk,jigpu/gtk,ahodesuka/gtk,Adamovskiy/gtk,msteinert/gtk,grubersjoe/adwaita,jadahl/gtk,bratsche/gtk-,Distrotech/gtk2,bratsche/gtk-,Lyude/gtk-,davidgumberg/gtk,ebassi/gtk,alexlarsson/gtk,Distrotech/gtk2,Adamovskiy/gtk,alexlarsson/gtk,Adamovskiy/gtk,Sidnioulz/SandboxGtk,ahodesuka/gtk,chergert/gtk,jigpu/gtk,davidt/gtk,bratsche/gtk-,msteinert/gtk,ebassi/gtk,ahodesuka/gtk,jessevdk/gtk,bratsche/gtk-,davidt/gtk,davidt/gtk,jessevdk/gtk,Distrotech/gtk2,davidgumberg/gtk,jadahl/gtk,chergert/gtk,ahodesuka/gtk,Adamovskiy/gtk