Don't reopen already opened wallet.
Don't reopen already opened wallet.

* subversion/libsvn_auth_kwallet/kwallet.cpp
  (wallet): New.
  (kwallet_password_get, kwallet_password_set): Open wallet only when wallet
   wasn't opened earlier.
  (kwallet_disconnect): New.

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