Belated MFC of rev. 1.49:   Do not leak lock in the case of EEXIST error.
Belated MFC of rev. 1.49:
  Do not leak lock in the case of EEXIST error.

PR:		kern/92776

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase