DEVEL15-windows-misc-fixes-20061006

DEVEL15-windows-misc-fixes-20061006

#ifdef DEBUG_REFCOUNT the ref count log entries so they aren't always
compiled in

comment out the remaining location where the write lock on cm_scacheLock
is dropped in order to obtain the scache mutex on the object returned
from cm_GetNewSCache().  Dropping the lock results in more than one
thread being given the same cm_scache_t which is more dangerous than
blowing away the contents of the object without holding the mutex

ensure that cm_BufWrite is always called with a non-NULL scp.  Add
an assertion to double check that we do it all the time.

(cherry picked from commit ffe26eb18da581d2df02f9531d97e31e1c6dee65)