glib/gchecksum.c: In function ‘digest_to_string’:
glib/gchecksum.c:186:17: error: comparison of integer expressions of different signedness: ‘gint’ {aka ‘int’} and ‘gsize’ {aka ‘long unsigned int’} [-Werror=sign-compare]
   for (i = 0; i < digest_len; i++)
                 ^