work on some debian-like platforms where /lib/init/vars/sh doesn't exist

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8071 d0543943-73ff-0310-b7d9-9358b9ac24b2

debian/freeswitch.init

@@ -51,7 +51,7 @@ esac
 
 # Define LSB log_* functions.
 # Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
-. /lib/lsb/init-functions
+[ -x /lib/init/vars.sh ] && . /lib/lsb/init-functions
 
 #
 # Function that starts the daemon/service