[bug-gettext] check format

[Trần Ngọc Quân]

Hello,
-c option display fatal error for  (Vé domain in TranslationProject.org):

msgid "for Google's usual 30% share."
msgstr "30% chia sẻ cho Google."

Note: I truncated (edited) this string!
This isn't a format string, so msgfmt should warring it instead of
return a fatal error.

msgstr "30% sẻ cho Google."

will OK, but it isn't easy

-- 
Trần Ngọc Quân.