Previously, if the client's subscription to the frame buffer became
invalid for any reason, the video feed in OBS would freeze until the
user goes in and changes any of the settings. This commit allows the
plugin to automatically attempt to recover.
Under Wayland, if the mouse pointer is disconnected whilst captured
(like say via KVM switch), the waylandWarpPointer code will be called
but the pointer will be NULL. This results in the cryptic message:
error marshalling arguments for confine_pointer (signature noo?ou): null value passed for arg 2
Error marshalling request: Invalid argument
This patch adds a check on the wlWm.pointer pointer before attempting
to warp the pointer, and avoids the crash.
