fix for bug 135.   Don't issue a truncate request if the inode size matches the truncate size.  This patch gets into the debate of whether the client should trust his copy of the size attribute or forward the  request off to the mds so that a more authoritative decision can be made.  Since partial truncate support is still in development, we trust the client has current attributes.
fix for bug 135.   Don't issue a truncate request if the inode size matches the truncate size.  This patch gets into the debate of whether the client should trust his copy of the size attribute or forward the 
request off to the mds so that a more authoritative decision can be made.  Since partial truncate support
is still in development, we trust the client has current attributes.





git-svn-id: ae92b08b608af1c8cefa3e10d2325ea527204e07@16361 3eda493b-6a19-0410-b2e0-ec8ea4dd8fda

pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable