Handle emulated keyboard input that arrives as VK_PACKET
Handle emulated keyboard input that arrives as VK_PACKET

Fixes bug #642772. Thanks to the anonymous bug reporter for providing
a test program.

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