Fix a problem in r14066 noticed by Garrett Rooney: if we failed to get the write lock, we would leave the mutex locked.
Fix a problem in r14066 noticed by Garrett Rooney: if we failed to get
the write lock, we would leave the mutex locked.

* subversion/libsvn_fs_fs/fs_fs.c (svn_fs_fs__with_write_lock): If we
  don't get the write lock, destroy the subpool and unlock the mutex
  before returning an error.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion