common: Let format_text return an error.
* common/stringhelp.c (format_text): Return NULL on error. * common/t-stringhelp.c (test_format_text): Adjust for change. * g10/gpgcompose.c (show_help): Abort on out of core. * g10/tofu.c (ask_about_binding): Abort on format_text error. (show_statistics): Ditto. (show_warning): Ditto.
For better re-usability function in common/ shot better not use
xmalloc functions.
- Signed-off-by: Werner Koch <wk@gnupg.org>