STABLE14-windows-winqual-20060206

STABLE14-windows-winqual-20060206

Fix two bugs reported via Windows Crash Reporting:

 * Freelance initialization is somehow broken allowing the number of
   locally defined mountpoints to become negative.  Due to the use of
   != instead of < in loops, it is possible to read/write unallocated
   memory.

 * GetTextualSid() was not properly handling a NULL output buffer
   pointer as an indication that the desired size should be returned.

(cherry picked from commit 77de32ed745d912e35990c5602b4a69a1b654973)