#12 Fix line counting in test.sh by redirecting stderr to /dev/null

[Andi]

Thanks for the patches! In total this would be the following:

--------------------------------- test/test.sh ---------------------------------
index bae3f71..0c2e3e2 100755
@@ -575,7 +575,7 @@ stop_and_clean(){
     echo
     ## +3 is for "Test tsize option ..." and "Test PCRE mapped download ... "
     ## +2 for diskspace tests:
-    local M=$(grep "/tmp/" "$TDIR"/multicast*.log | wc -l)
+    local D M=$(grep "/tmp/" "$TDIR"/multicast*.log 2> /dev/null | wc -l)
     $INTERACTIVE && D=2
     cat <<EOF