Fix memory leak closing DIR ccaches

A ccache type's close function is supposed to free the cache container
as well as the type-specific data.  dcc_close was not doing so,
causing a small memory leak each time a ccache is created or
destroyed.

https://github.com/krb5/krb5/commit/c264c4e824e1abe77806e7bf43ab2641459b7ee9
Author: Greg Hudson <ghudson@mit.edu>
Commit: c264c4e824e1abe77806e7bf43ab2641459b7ee9
Branch: master
 src/lib/krb5/ccache/cc_dir.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)