SEGV on mget with wildcards with no match

[luis fernandes]

This is on FreeBSD 4.6-STABLE, doing an mget with wildcard char on a
non-existent file(s) produces a SEGV.

Reproduce the bug as follows (Note: "zqw*" is a pattern that does not
match):

% sftp user at host
  user at host's password:
sftp> mget zqw*

Program received signal SIGSEGV, Segmentation fault.
0x804c5db in process_get (conn=0x80520e0, src=0x80540b0 "zwq*",
dst=0x0,
    pwd=0x8052100 "/home/faculty/elf", pflag=0)
    at
    /usr/src/secure/usr.bin/sftp/../../../crypto/openssh/sftp-int.c:371
(gdb) p g.gl_pathv[0]
Error accessing memory address 0x0: Bad address.