copy_process() appears to be the only caller of acct_clear_integrals() and
does not pass in NULL task pointers.  Remove the unecessary check.
Signed-off-by: Matt Helsley <matthltc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>