/usr/bin/rsvg removed from latest upload (causing FTBFSes in archive)

As important: the "convert" command no longer works on precise - which has a large affect on many users

convert -resize 48x48 Icon_Librecad.svg debian/librecad.png
sh: 1: rsvg: not found

Ok, found that /usr/bin/rsvg has been removed by upstream, yet imagemagick is still calling it:
https://bugzilla.gnome.org/show_bug.cgi?id=580325

imagemagick needs to not call it anymore

Right, it got dropped in http://git.gnome.org/browse/librsvg/commit/rsvg.in?id=fd76212e2dc8e41b2c23d6e76c02cc7803da4a12

From the linked debian bug:
imagemagick is not supposed to use /usr/bin/rsvg because it's supposed to pull in it's own svg converter in the package libmagick?-extras where ? is the SONAME version, and is recommended by imagemagick.

However, as you can see in:
https://launchpadlibrarian.net/92231198/buildlog_ubuntu-precise-i386.librecad_1.0.0%2Bnolibs-1_FAILEDTOBUILD.txt.gz

it is pulling in:
libmagickcore4

but is NOT pulling in:
libmagickcore4-extra

since it is only a recommends.

So this is the real bug:
1) imagemagick's convert first will try to use the internal svg converter found in the recommended package libmagickcore4-extra. Since it is recommended, it is not pulled into the buildds.
2) When libmagickcore?-extra is missing on a system (such as the buildds and a user's system), "convert" will fall back to /usr/bin/rsvg. However, that file no longer exists in ubuntu.

The hack, for now, is to build depend on imagemagickcore4-extra - but that requires bumping the dependency name everytime libmagickcore gets a SONAME bump (which happened between oneiric and precise). or you can depend on libmagickcore-dev which will pull in the correct libmagickcore?-extra, but that's really overkill

forwarded upstream to imagemagick:
http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=20315

svn commit 6793

attached is a debdiff using imagemagick's upstream svn commit 6793

For the record, I also filed bug #931802 against librsvg itself.

This bug was fixed in the package imagemagick - 8:6.6.9.7-5ubuntu3

---------------
imagemagick (8:6.6.9.7-5ubuntu3) precise; urgency=low

  * 0006-rsvg-convert.patch: upstream removed the rsvg command from
    librsvg2-bin, use rsvg-convert instead (LP: #929573)
 -- Scott Howard <email address hidden> Fri, 17 Feb 2012 12:39:05 +0200