Add a weak pointer to draw polygon's context
Add a weak pointer to draw polygon's context

Bug 604784: SIGSEGV in function cairo_set_operator

Distrotech/libchamplain,Distrotech/libchamplain,potyl/champlain,StanciuMarius/Libchamplain-map-wrapping,Distrotech/libchamplain,GNOME/perl-Champlain,PabloCastellano/libchamplain,GNOME/libchamplain,potyl/champlain,GNOME/perl-Gtk2-Champlain,Distrotech/libchamplain,GNOME/perl-Gtk2-Champlain,StanciuMarius/Libchamplain-map-wrapping,StanciuMarius/Libchamplain-map-wrapping,GNOME/libchamplain,PabloCastellano/libchamplain,Distrotech/libchamplain,StanciuMarius/Libchamplain-map-wrapping,GNOME/perl-Champlain,PabloCastellano/libchamplain,potyl/champlain,PabloCastellano/libchamplain,StanciuMarius/Libchamplain-map-wrapping,PabloCastellano/libchamplain,potyl/champlain