[PATCH] Remove duplicate code in signal.c

Combine a bit of redundant code between force_sig_info() and
force_sig_specific().

Signed-off-by:  <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>