DEVEL15-windows-aclent-remove-extraneous-code-20071024

DEVEL15-windows-aclent-remove-extraneous-code-20071024

Microsoft provided a dump showing cm_data.aclLRUEndp == NULL in
GetFreeACLEnt().  Couldn't find any reason why that would be true.
However, there is extraneous code that manipulates the value of
aclLRUEndp when it should be left to osi_QRemoveHT() to update
the pointer values.

Also add an additional explicit test for aclLRUEndp == NULL in
GetFreeACLEnt().

(cherry picked from commit fb7595ad1d31c5ccafa18de854f2bf8bc8c067de)