Fix spurious failre with Pandas 0.13.

* src/tgbatest/ltlcross4.test: Work around Pandas 0.13.
* NEWS: Mention it.

NEWS

@@ -10,6 +10,7 @@ New in spot 1.2.2a (not yet released)
     - randltl -S did not honor --boolean-priorities.
     - randltl had trouble generating formulas when all unary, or
       all binary/n-ary operators were disabled.
+    - Fix spurious testsuite failure when using Pandas 0.13.
 
 New in spot 1.2.2 (2014-01-24)
 

src/tgbatest/ltlcross4.test

 #!/bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2012, 2013 Laboratoire de Recherche et Développement
-# de l'Epita (LRDE).
+# Copyright (C) 2012, 2013, 2014 Laboratoire de Recherche et
+# Développement de l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
 #
@@ -51,8 +51,10 @@ EOF
 # will exit 77 if panda is not installed
 $PYTHON test.py >out.1
 
-# remove trailing whitespace from pandas' output
-sed 's/[ \t]*$//g' <out.1 > py.out
+# remove trailing whitespace from pandas' output,
+# and limit to 26 lines, because Pandas 0.13 adds
+# the size of the dataframe afterwards.
+sed 's/[ \t]*$//g;26q' <out.1 > py.out
 
 cat >expected <<EOF
                       states  transitions