Small improvement. Discard the inner write if the two WRITEs are to the same index.
Small improvement. Discard the inner write if the two WRITEs are to the same index.

git-svn-id: 5069ba8be4c997ee907bf46f8ec9a2bbfb655637@1247 e59a4935-1847-0410-ae03-e826735625c1

linpc/STP,linpc/STP,linpc/STP,linpc/STP,linpc/STP