[metacity] FreeBSD build fix: Include sys/wait.h as described in POSIX specs

[Colin Walters <walters src gnome org>]

commit 3a5c363ccbbfaefa4a2a2cb4744929f99215ea7f
Author: Alexis Ballier <aballier gentoo org>
Date:   Thu Nov 5 19:48:41 2009 +0100

    FreeBSD build fix: Include sys/wait.h as described in POSIX specs
    
    https://bugzilla.gnome.org/show_bug.cgi?id=598572

 src/core/main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/core/main.c b/src/core/main.c
index ac253bd..ea0ff89 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -58,7 +58,7 @@
 
 #include <stdlib.h>
 #include <sys/types.h>
-#include <wait.h>
+#include <sys/wait.h>
 #include <stdio.h>
 #include <string.h>
 #include <signal.h>