pidgin-twitter version 0.9.2-1 failed to build in oneiric

pidgin-twitter version 0.9.2-1 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2708167

Details about the rebuild:
http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20110816-oneiric.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2708167/+files/buildlog_ubuntu-oneiric-amd64.pidgin-twitter_0.9.2-1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 1143 lines into the build log:

   dh_auto_build
make[1]: Entering directory `/build/buildd/pidgin-twitter-0.9.2'
cc -MM main.c util.c prefs.c icon.c twitter_api.c > .deps
make[1]: Leaving directory `/build/buildd/pidgin-twitter-0.9.2'
make[1]: Entering directory `/build/buildd/pidgin-twitter-0.9.2'
cc -o main.o main.c -c -fPIC -shared -Wall -Werror -g -pthread -I/usr/include/gtk-2.0 -I/usr/lib/x86_64-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/pidgin -I/usr/include/libpurple -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/libxml2 -DDATADIR=\"/usr/share\"
main.c: In function 'attach_to_conv':
main.c:714:16: error: variable 'imhtml' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors

make[1]: *** [main.o] Error 1
make[1]: Leaving directory `/build/buildd/pidgin-twitter-0.9.2'
dh_auto_build: make -j1 returned exit code 2
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110822-1500
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/pidgin-twitter-0.9.2