make sure we have no old squashfs around before attempting to run mksquashfs

debian/changelog

@@ -1,3 +1,10 @@
+livecd-rootfs (1.103) UNRELEASED; urgency=low
+
+  * make sure there is no old squashfs around before attempting to squash a
+    new one.
+
+ -- Oliver Grawert <ogra@ubuntu.com>  Mon, 07 Dec 2009 11:27:50 +0100
+
 livecd-rootfs (1.102) lucid; urgency=low
 
   * Don't output a newline in filesystem.size.

livecd.sh

@@ -631,6 +631,9 @@ Pin-Priority: 550
       : > livecd.${FSS}.sort
     fi
 
+    # make sure there is no old squashfs idling around
+    rm -f livecd.${FSS}.squashfs
+
     mksquashfs ${ROOT} livecd.${FSS}.squashfs -sort livecd.${FSS}.sort
     chmod 644 livecd.${FSS}.squashfs
   }