* *.c (*): initialize lock_arg to a copy of a static

	* *.c (*): initialize lock_arg to a copy of a static
 	(thus zero) struct flock, to avoid panic'ing sunos 4.1.4.

If you call fcntl F_SETLKW with l_type == F_UNLCK and l_xxx == 15
(GRANT_LOCK_FLAG) you'll panic sunos 4.1.4 with
assertion failed: ld->l_xxx != GRANT_LOCK_FLAG, file: ../../ufs/ufs_lockf.c, line: 995

Since automatic structs like these have random values in uninitialized
fields, we initialize from a static struct (since using memset in this
case is abhorrent, and naming l_xxx is non POSIX.)

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@7109 dc483132-0cff-0310-8789-dd5450dbe970