Parsing any custom routes for any custom interfaces was broken so that
arbitrary routes were imported when not all interfaces were in use.

Signed-off-by: Michael Tremer <michael.tremer(a)ipfire.org>
---
 html/cgi-bin/connections.cgi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/html/cgi-bin/connections.cgi b/html/cgi-bin/connections.cgi
index af375effe..705118576 100644
--- a/html/cgi-bin/connections.cgi
+++ b/html/cgi-bin/connections.cgi
@@ -89,6 +89,9 @@ my @routes = &General::system_output("ip", "route", "show");
 
 # Find all routes
 foreach my $intf (keys %interfaces) {
+	# Skip empty interfaces
+	next if ($intf eq "");
+
 	foreach my $route (grep(/dev ${intf}/, @routes)) {
 		if ($route =~ m/^(\d+\.\d+\.\d+\.\d+\/\d+)/) {
 			$networks{$1} = $interfaces{$intf};
-- 
2.39.5