Compilation error when using a version of 2geom newer than 2013

[Apteryx]

/tmp/guix-build-libdepixelize-0.0.0-1.187.drv-0/source/src/priv/splines-kopf2011.h:96:21: error: ‘class Geom::PathVector’ has no member named ‘reserve’; did you mean ‘reverse’?
     dest.pathVector.reserve(source.holes.size() + 1);
                     ^~~~~~~
                     reverse

The libdepixelize bundled with Inkscape has a simple fix: simply delete the offending line, as it is a remnant from a time PathVector was implemented using std::vector. See: https://gitlab.com/inkscape/inkscape/-/blob/master/src/3rdparty/libdepixelize/priv/splines-kopf2011.h#L96

[Apteryx (maxco)]

Unfortunately there are other build errors that are not addressed in the Inkscape version (it doesn't include the files which are failing to build):

```
/tmp/guix-build-libdepixelize-0.0.0-1.187.drv-0/source/src/priv/splines-kopf2011.h:96:21: error: ‘class Geom::PathVector’ has no member named ‘reserve’; did you mean ‘reverse’?
     dest.pathVector.reserve(source.holes.size() + 1);
                     ^~~~~~~
                     reverse
/tmp/guix-build-libdepixelize-0.0.0-1.187.drv-0/source/src/priv/splines-kopf2011.h: In instantiation of ‘Tracer::Splines::Splines(const Tracer::HomogeneousSplines<T>&, bool, int) [with T = double]’:
/tmp/guix-build-libdepixelize-0.0.0-1.187.drv-0/source/src/kopftracer2011.cpp:181:52: required from here
/tmp/guix-build-libdepixelize-0.0.0-1.187.drv-0/source/src/priv/splines-kopf2011.h:140:37: warning: unused parameter ‘nthreads’ [-Wunused-parameter]
                  bool optimize, int nthreads) :
                                     ^~~~~~~~
make[2]: *** [src/CMakeFiles/depixelize.dir/build.make:66: src/CMakeFiles/depixelize.dir/kopftracer2011.cpp.o] Error 1
make[2]: Leaving directory '/tmp/guix-build-libdepixelize-0.0.0-1.187.drv-0/build'
make[1]: *** [CMakeFiles/Makefile2:117: src/CMakeFiles/depixelize.dir/all] Error 2
make[1]: Leaving directory '/tmp/guix-build-libdepixelize-0.0.0-1.187.drv-0/build'
make: *** [Makefile:133: all] Error 2
command "make" "-j" "2" failed with status 2
note: keeping build directory `/tmp/guix-build-libdepixelize-0.0.0-1.187.drv-0'
builder for `/gnu/store/jd5439lxncfqw3ipggqz4rcw7paqap9n-libdepixelize-0.0.0-1.187.drv' failed with exit code 1
build of /gnu/store/jd5439lxncfqw3ipggqz4rcw7paqap9n-libdepixelize-0.0.0-1.187.drv failed
View build log at '/var/log/guix/drvs/jd/5439lxncfqw3ipggqz4rcw7paqap9n-libdepixelize-0.0.0-1.187.drv.bz2'.
guix build: error: build of `/gnu/store/jd5439lxncfqw3ipggqz4rcw7paqap9n-libdepixelize-0.0.0-1.187.drv' failed
maxim@apteryx ~/src/guix-core-updates [env]$ ./pre-inst-env guix build libdepixelize
;;; note: source file /home/maxim/src/guix-core-updates/gnu/packages/image.scm
;;; newer than compiled /home/maxim/src/guix-core-updates/gnu/packages/image.go
;;; note: source file /home/maxim/src/guix-core-updates/gnu/packages/image.scm
;;; newer than compiled /run/current-system/profile/lib/guile/2.2/site-ccache/gnu/packages/image.go
;;; note: source file /home/maxim/src/guix-core-updates/gnu/packages/gnome.scm
;;; newer than compiled /home/maxim/src/guix-core-updates/gnu/packages/gnome.go
;;; note: source file /home/maxim/src/guix-core-updates/gnu/packages/gnome.scm
;;; newer than compiled /run/current-system/profile/lib/guile/2.2/site-ccache/gnu/packages/gnome.go
;;; note: source file /home/maxim/src/guix-core-updates/gnu/packages/gtk.scm
;;; newer than compiled /home/maxim/src/guix-core-updates/gnu/packages/gtk.go
;;; note: source file /home/maxim/src/guix-core-updates/gnu/packages/gtk.scm
;;; newer than compiled /run/current-system/profile/lib/guile/2.2/site-ccache/gnu/packages/gtk.go
;;; note: source file /home/maxim/src/guix-core-updates/gnu/packages/textutils.scm
;;; newer than compiled /home/maxim/sr...