Don't fall back to master on password read error

If a password or other prompted value cannot be read, retrying with
the master KDC is confusing because it prompts again for the same
input.

https://github.com/krb5/krb5/commit/913bd4332123929909553ba7271c767606e8f1c7
Author: Greg Hudson <ghudson@mit.edu>
Commit: 913bd4332123929909553ba7271c767606e8f1c7
Branch: master
 src/lib/krb5/krb/gic_pwd.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)