[Unix] make sure shared memory is created if it doesn't exist

[zsawyer]

asiekierka commented 20 days ago

Only O_RDWR is set, but MumbleLink.[uid] does not exist, causing shm_open to fail terribly since it's >not told to create the shm if not present.

ToDo:

make sure it is fixed with adding | O_CREAT in the new mumble-LinkAPI.

@LinkAPI.c#L73

[zsawyer]

more details in zsawyer/MumbleLink#9