Close FILE handles on error

Functions for reading quota specification in quotaops.c create new
temporary FILE stream handle, they close it on successful return,
but they forget to close it on unsuccessful return. That leads to
memory leaks. This patch ensures that the handle gets closed in all
cases.

Signed-off-by: Petr Písař <ppisar@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>