glib/gprimes.c: In function ‘g_spaced_primes_closest’:
glib/gprimes.c:91:17: error: comparison of integer expressions of different signedness: ‘gint’ {aka ‘int’} and ‘long unsigned int’ [-Werror=sign-compare]
   for (i = 0; i < G_N_ELEMENTS (g_primes); i++)
                 ^