build failure with gtk+-2.13.x: widgets/dash-selector.cpp:96: error: ‘gtk_marshal_NONE__NONE’ was not declared in this scope

 i686-pc-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I.. -I/usr/lib/perl5/5.8.8/i686-linux/CORE -I/usr/include/freetype2 -pthread -DORBIT2=1 -I/usr/include/gnome-vfs-2.0 -I/usr/lib/gnome-vfs-2.0/include -I/usr/include/gconf/2 -I/usr/include/orbit-2.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/freetype2 -I/usr/include/poppler -I/usr/include/poppler/glib -I/usr/include/poppler -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/cairo -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/pango-1.0 -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/pixman-1 -DPOTRACE=\"potrace\" -pthread -I/usr/include/gdkmm-2.4 -I/usr/lib/gdkmm-2.4/include -I/usr/include/glibmm-2.4 -I/usr/lib/glibmm-2.4/include -I/usr/include/pangomm-1.4 -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/cairomm-1.0 -I/usr/include/sigc++-2.0 -I/usr/lib/sigc++-2.0/include -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/pango-1.0 -I/usr/include/cairo -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/pixman-1 -I/usr/include/gtkmm-2.4 -I/usr/lib/gtkmm-2.4/include -I/usr/include/atkmm-1.6 -I/usr/include/atk-1.0 -I/usr/include/libxml2 -I/usr/include/gtkspell-2.0 -I../cxxtest -Wall -Wformat-security -W -Wpointer-arith -Wcast-align -Wsign-compare -Woverloaded-virtual -Wswitch -D_FORTIFY_SOURCE=2 -Wno-unused-parameter -ggdb -O1 -O2 -O3 -pipe -march=athlon-xp -mmmx -msse -m3dnow -MT widgets/dash-selector.o -MD -MP -MF $depbase.Tpo -c -o widgets/dash-selector.o widgets/dash-selector.cpp &&\
 mv -f $depbase.Tpo $depbase.Po
widgets/dash-selector.cpp: In function ‘GtkType sp_dash_selector_get_type()’:
widgets/dash-selector.cpp:81: warning: deprecated conversion from string constant to ‘gchar*’
widgets/dash-selector.cpp: In function ‘void sp_dash_selector_class_init(SPDashSelectorClass*)’:
widgets/dash-selector.cpp:96: error: ‘gtk_marshal_NONE__NONE’ was not declared in this scope
make: *** [widgets/dash-selector.o] Error 1
make: Leaving directory `/var/tmp/portage/media-gfx/inkscape-0.46-r3/work/inkscape-0.46/src'

gtk+-2.13 deprecates the gtk_marshal_ family; the replacement C marshallers are in g_cclosure_marshal_.

Patch to follow.