squash: belt & braces

scripts/get

@@ -21,7 +21,7 @@
 . config/options $1
 
 _get_file_already_downloaded() {
-  [ ! -f $PACKAGE ] && return 1
+  [ ! -f $PACKAGE -o ! -f $STAMP_URL -o ! -f $STAMP_SHA ] && return 1
   [ -n "${PKG_SHA256}" -a "$(cat $STAMP_SHA 2>/dev/null)" != "${PKG_SHA256}" ] && return 1
   return 0
 }