[3.0] Use requested win32 dvb-adapter parameter
Use requested win32 dvb-adapter parameter by looking for passed argument more thoroughly, matching linux dvb-adapter lookup.
I've tested this against vlc-3.0 git branch, and the issue remains in 4.0 development branch.
Enables using multiple instances of vlc each capturing their own dvb-adapter, or a single libvlc instance capturing from multiple adapters via multiple player instances.
(cherry picked from commit 81ce022f)