api request helper: fix conditional declaration

Reported-by: Fiona Ebner <f.ebner@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/src/PVE/Network/SDN.pm b/src/PVE/Network/SDN.pm
index cc5febec81f9030589da3046fa99edea6816994f..68f9e0fffbfecea2503978414bc9e1e4c7839e3a 100644 (file)
--- a/src/PVE/Network/SDN.pm
+++ b/src/PVE/Network/SDN.pm
@@ -262,7 +262,7 @@ sub encode_value {
 sub api_request {
     my ($method, $url, $headers, $data, $expected_fingerprint) = @_;
 
-    my $encoded_data = to_json($data) if $data;
+    my $encoded_data = $data ? to_json($data) : undef;
 
     my $req = HTTP::Request->new($method,$url, $headers, $encoded_data);