Unlock the cache lock before returning when we run out of buffer space trying to fill in the full path name.
Unlock the cache lock before returning when we run out of buffer space
trying to fill in the full path name.

Reported by:	David Naylor <naylor.b.david@gmail.com>
Approved by:	kib

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