libvlc: fix network media parsing
Calls to libvlc_media_parse_request
with smb server URL never succeeded
because do_parse
var was always false
when input_net
var was true
and libvlc_media_parse_network
flag was set.
This change fixes this problem and bring back the ability to parse network
files when the libvlc_media_parse_network
flag is set