Fixed previous commit on autogen.sh default config

Change-Id: I29cc49dcc284b462ac29d0d040e331f3e6d08e74
Reviewed-on: https://gerrit.libreoffice.org/1097Reviewed-by: Rene Engelhard <rene@debian.org>
Tested-by: Rene Engelhard <rene@debian.org>

autogen.sh

@@ -103,13 +103,12 @@ if (!@ARGV) {
     @cmdline_args = @ARGV;
 }
 
+my @args;
 my $default_config = "distro-configs/default.conf";
 if (-f $default_config) {
     print STDERR "Reading default config file: $default_config\n";
     push @args, read_args ($default_config);
 }
-
-my @args;
 for my $arg (@cmdline_args) {
     if ($arg eq '--clean') {
         clean();