2.5.4-pre6 compile fix for i386/kernel/signal.c

Hi Linus,

The attached patch fixes a compiler warning in signal.c due to a missing prototype:

signal.c: In function `do_signal':
signal.c:681: warning: implicit declaration of function `do_coredump'

If binfmts.h should not be included, the prototype should be declared extern.

Regards,
Udo.

@@ -20,6 +20,7 @@
 #include <linux/stddef.h>
 #include <linux/tty.h>
 #include <linux/personality.h>
+#include <linux/binfmts.h>
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
 #include <asm/i387.h>