Change sigreturn to have no arguments.

sys/compat/linux/arch/amd64/syscalls.master

@@ -1,4 +1,4 @@
-	$NetBSD: syscalls.master,v 1.3 2005/05/16 21:17:11 fvdl Exp $
+	$NetBSD: syscalls.master,v 1.4 2005/05/22 19:29:15 fvdl Exp $
 
 ;	@(#)syscalls.master	8.1 (Berkeley) 7/19/93
 
@@ -85,8 +85,7 @@
 			    const linux_sigset_t *set, \
 			    linux_sigset_t *oset, \
 			    size_t sigsetsize); }
-15	STD		{ int linux_sys_rt_sigreturn( \
-			    struct linux_ucontext *ucp); }
+15	NOARGS		{ int linux_sys_rt_sigreturn(void); }
 16	STD		{ int linux_sys_ioctl(int fd, u_long com, \
 			    caddr_t data); }
 17	STD		{ int linux_sys_pread(int fd, char *buf, \