With:
make -j5   check
Making check in po
make[1]: Entering directory '/var/tmp/portage/mail-client/balsa-2.5.2/work/balsa-2.5.2/po'
INTLTOOL_EXTRACT="/usr/bin/intltool-extract" XGETTEXT="/usr/bin/xgettext" srcdir=. /usr/bin/intltool-update --gettext-package balsa --pot
rm -f missing notexist
srcdir=. /usr/bin/intltool-update -m
The following files contain translations and are currently not in use. Please
consider adding these to the POTFILES.in file, located in the po/ directory.

src/balsa-print-object.c

If some of these files are left out on purpose then please add them to
POTFILES.skip instead of POTFILES.in. A file 'missing' containing this list
of left out files has been written in the current directory.
if [ -r missing -o -r notexist ]; then \
  exit 1; \
fi
Makefile:246: recipe for target 'check' failed
make[1]: *** [check] Error 1
make[1]: Leaving directory '/var/tmp/portage/mail-client/balsa-2.5.2/work/balsa-2.5.2/po'
Makefile:675: recipe for target 'check-recursive' failed
make: *** [check-recursive] Error 1