I have adjusted mutex_vms.c to correct the unterminated comment.  However,
I'm not sure how this would have stopped the code from being called as the
pre-processor would only have left that code in if compiling on a VAX system.
Thread safety should always be on, that is why it was developed to use the
tis interface (so thread safety could be enabled, without a need to link
against the pthreads RTL).

Just to be sure that thread safety is always enabled, the CONFIG.H generated
by DESCRIP.MMS has been amended to also #undef SQLITE_MUTEX_NOOP/  This
supplements the existing definition of SQLITE_THREADSAFE.

This fixes #2.