PRJQUOTA value of quota type should never reach need_print_warning() since XFS
(which is the only fs which uses that type) doesn't use generic functions
calling this function. Anyway, add PRJQUOTA case to the switch to make gcc
happy.
Signed-off-by: Jan Kara <jack@suse.cz>
                        return uid_eq(current_fsuid(), warn->w_dq_id.uid);
                case GRPQUOTA:
                        return in_group_p(warn->w_dq_id.gid);
+               case PRJQUOTA:  /* Never taken... Just make gcc happy */
+                       return 0;
        }
        return 0;
 }