Mark as broken, does not build:

cc1: warnings being treated as errors
jbsrc/lib/jb-main.c: In function 'jb_main':
jbsrc/lib/jb-main.c:164: warning: 'g_type_init' is deprecated (declared at
+/usr/local/include/glib-2.0/gobject/gtype.h:669)
cc1: warnings being treated as errors
jbsrc/lib/jb-util.c: In function 'print_warning_or_error':
jbsrc/lib/jb-util.c:242: warning: function might be possible candidate for 'printf' format attribute
ERROR: cannot build jb

• [do-configure] Error code 1

Reported by: pkg-fallout