Avoid gcc warning
		'retval' might be used uninitialized in this function
	The compiler is actually right and this is a bug.

	There is another such warning:
		tools/dbus-send.c:356: warning: 'secondary_type' might be ...
	Since that type of warning indicates a potential problem it would be
	nice if that warning could be avoided.

diff -ur dbus-1.2.4.orig/bus/activation.c dbus-1.2.4/bus/activation.c
--- dbus-1.2.4.orig/bus/activation.c	2008-08-07 20:44:35.000000000 +0200
+++ dbus-1.2.4/bus/activation.c	2008-11-21 12:05:00.000000000 +0100
@@ -722,11 +722,7 @@
       _dbus_string_set_length (&value, 0);
     }
 
-  if (environment[i] != NULL)
-    goto out;
-
-  retval = TRUE;
-out:
+  retval = (environment[i] == NULL ? TRUE : FALSE);
 
   _dbus_string_free (&key);
   _dbus_string_free (&value);