printing: Don't double free connection to CUPS
printing: Don't double free connection to CUPS

Don't call httpClose() on http connections which are created
outside of GtkCupsRequest in GtkCupsRequest's functions.

https://bugzilla.gnome.org/show_bug.cgi?id=720338

jigpu/gtk,jadahl/gtk,chergert/gtk,ahodesuka/gtk,jessevdk/gtk,grubersjoe/adwaita,ahodesuka/gtk,davidgumberg/gtk,Adamovskiy/gtk,jigpu/gtk,ahodesuka/gtk,msteinert/gtk,Adamovskiy/gtk,ahodesuka/gtk,chergert/gtk,jadahl/gtk,jessevdk/gtk,jadahl/gtk,Lyude/gtk-,Sidnioulz/SandboxGtk,msteinert/gtk,Adamovskiy/gtk,msteinert/gtk,jadahl/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,alexlarsson/gtk,alexlarsson/gtk,Lyude/gtk-,alexlarsson/gtk,msteinert/gtk,grubersjoe/adwaita,davidgumberg/gtk,davidgumberg/gtk,ahodesuka/gtk,jigpu/gtk,grubersjoe/adwaita,chergert/gtk,Lyude/gtk-,jessevdk/gtk,msteinert/gtk,Lyude/gtk-,alexlarsson/gtk,Sidnioulz/SandboxGtk,Adamovskiy/gtk,jigpu/gtk,alexlarsson/gtk,jigpu/gtk,davidgumberg/gtk,Sidnioulz/SandboxGtk,davidgumberg/gtk,davidgumberg/gtk,grubersjoe/adwaita,Lyude/gtk-,jigpu/gtk,Sidnioulz/SandboxGtk,jessevdk/gtk,davidgumberg/gtk,grubersjoe/adwaita,chergert/gtk,grubersjoe/adwaita,jigpu/gtk,grubersjoe/adwaita,jigpu/gtk,Sidnioulz/SandboxGtk,davidgumberg/gtk,Lyude/gtk-,jadahl/gtk,grubersjoe/adwaita,alexlarsson/gtk,Lyude/gtk-,ahodesuka/gtk,jessevdk/gtk,chergert/gtk,chergert/gtk,Adamovskiy/gtk,jessevdk/gtk,chergert/gtk,Adamovskiy/gtk,Lyude/gtk-,ahodesuka/gtk,alexlarsson/gtk,Adamovskiy/gtk,jessevdk/gtk,chergert/gtk,jadahl/gtk,ahodesuka/gtk,jadahl/gtk,alexlarsson/gtk,msteinert/gtk,Adamovskiy/gtk