wvtestrun: Do not use colors on dumb terminals

This is helpful for example when the tests are run by compile command
under Emacs.

diff --git a/wvtestrun b/wvtestrun
index 248a1c54b6601f6a7b1d99c17742ffcf6f0ffae7..f4ce482d7ad928ca8046ff682a0d6f3ca54dac98 100755 (executable)
--- a/wvtestrun
+++ b/wvtestrun
@@ -27,7 +27,7 @@ if (!$pid) {
     exit 126; # just in case
 }
 
-my $istty = -t STDOUT;
+my $istty = -t STDOUT && $ENV{'TERM'} ne "dumb";
 my @log = ();
 my ($gpasses, $gfails) = (0,0);