courier-0.74.1-fix-testsuite.diff

--- courier-0.74.1-plain/libs/maildrop/testsuite2	2013-08-30 02:36:07.000000000 +0200
+++ courier-0.74.1/libs/maildrop/testsuite2	2015-02-16 13:22:37.455698929 +0100
@@ -232,7 +232,8 @@
 
 for f in testsuite?.filter
 do
-    echo 'xfilter "cat"' >t
+    echo "SHELL=/bin/sh" > t
+    echo 'xfilter "cat"' >>t
     cat $f >>t
     chmod 600 t
     mv -f t $f