Fix configure not failing when invalid flags are passed to it.

diff --git a/configure b/configure
index 26f8146e7f02f6a3bb027a025d40760b7a5a1401..1a89845673ca9f0f195b60bfc34e4f3d96500444 100755 (executable)
--- a/configure
+++ b/configure
@@ -74,7 +74,7 @@ sub disable_extras (@);
 my @opt_enableextras;
 my @opt_disableextras;
 
-GetOptions(
+exit 1 unless GetOptions(
        'clean'  => \&cmd_clean,
        'help'   => \&cmd_help,
        'update' => \&cmd_update,