toolbar: Don't propagate events to placeholders
toolbar: Don't propagate events to placeholders

In particular don't when that's done using uninitialized memory

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