Fix a crash on sparc64 (and other 64-bit strict alignment archs).

The pid variable that is passed to XChangeProperty() is not a long.
The libX11 code deferences the variable as a long and on a 64-bit
sparc this must be aligned on a 8-byte boundary.

Obtained from:	upstream

x11-clocks/xclock/Makefile

@@ -7,6 +7,7 @@
 
 PORTNAME=	xclock
 PORTVERSION=	1.0.4
+PORTREVISION=	1
 CATEGORIES=	x11-clocks
 
 MAINTAINER=	x11@FreeBSD.org

x11-clocks/xclock/files/patch-xclock.c

@@ -0,0 +1,11 @@
+--- xclock.c.orig	2010-08-07 16:05:41.000000000 +0200
++++ xclock.c	2010-08-07 16:05:59.000000000 +0200
+@@ -215,7 +215,7 @@ main(int argc, char *argv[])
+ 
+ #ifdef HAVE_GETPID
+     {
+-	pid_t pid = getpid();
++	unsigned long pid = (unsigned long)getpid();
+ 	XChangeProperty(XtDisplay(toplevel), XtWindow(toplevel),
+ 			XInternAtom(XtDisplay(toplevel), "_NET_WM_PID", False),
+ 			XA_CARDINAL, 32, PropModeReplace,