in cifssmb.c add copy_from_user return value check and do minor formatting/whitespace cleanups.

[Steven French]

Yes - I had noticed the redundant checks on pointer to the SMB, but I 
don't think bothered to remove them (probably should have in retrospect 
since they make the code longer than need be)


Steve French
Senior Software Engineer
Linux Technology Center - IBM Austin
phone: 512-838-2294
email: sfrench at-sign us dot ibm dot com