libnsbmp version 0.0.1-1 failed to build in oneiric

libnsbmp version 0.0.1-1 failed to build in oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110816/+build/2702182

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/2702182/+files/buildlog_ubuntu-oneiric-amd64.libnsbmp_0.0.1-1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 227 lines into the build log:

make[1]: Leaving directory `/build/buildd/libnsbmp-0.0.1'
dh_clean
 debian/rules build
dh_testdir
/usr/bin/make COMPONENT_TYPE=lib-shared PREFIX=/usr
make[1]: Entering directory `/build/buildd/libnsbmp-0.0.1'
 COMPILE: src/libnsbmp.c
src/libnsbmp.c: In function 'bmp_analyse_header':
src/libnsbmp.c:297:11: error: variable 'uheight' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors

make[1]: *** [build-Linux-Linux-release-lib-shared/src_libnsbmp.o] Error 1
make[1]: Leaving directory `/build/buildd/libnsbmp-0.0.1'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110821-2107
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/libnsbmp-0.0.1