[IA64] ia32_signal.c: erroneous use of memset/memcpy

Found by Alexander Nyberg, improved by Bjorn Helgaas.

- Fix the incorrect argument to sizeof()
- looks like memcpy() code pass was dervived from code that used
  copy_from_user().  But in this case we are doing to kernel space
  to kernel space copy, so memcpy is the right routine, but it
  doesn't return an error code.
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/ia32/ia32_signal.c

@@ -460,10 +460,9 @@ __ia32_rt_sigsuspend (compat_sigset_t *sset, unsigned int sigsetsize, struct sig
 	sigset_t oldset, set;
 
 	scr->scratch_unat = 0;	/* avoid leaking kernel bits to user level */
-	memset(&set, 0, sizeof(&set));
+	memset(&set, 0, sizeof(set));
 
-	if (memcpy(&set.sig, &sset->sig, sigsetsize))
-		return -EFAULT;
+	memcpy(&set.sig, &sset->sig, sigsetsize);
 
 	sigdelsetmask(&set, ~_BLOCKABLE);