multimedia/baka-mplayer: unbreak with mpv 0.35

src/mpvhandler.cpp:218:18: error: use of undeclared identifier 'MPV_EVENT_UNPAUSE'; did you mean 'MPV_EVENT_NONE'?

case MPV_EVENT_UNPAUSE:
     ^~~~~~~~~~~~~~~~~
     MPV_EVENT_NONE

/usr/local/include/mpv/client.h:1223:5: note: 'MPV_EVENT_NONE' declared here

MPV_EVENT_NONE              = 0,
^

src/mpvhandler.cpp:221:18: error: use of undeclared identifier 'MPV_EVENT_PAUSE'

case MPV_EVENT_PAUSE:
     ^