Changelog:
- player: fix autofit/geometry related segfault
- ao_oss: add missing PATH_DEV_MIXER define
- egl_helpers: fix context creation if GLES 3 is not available
- audio: stop corrupting audio on underreads
- wayland: fix a potential segfault on surface enter
- vo_gpu: opengl: fix wrong glMemoryBarrier call
- vo_gpu: opengl: create context at version 4.4 again
- af_lavcac3enc: fix memory leak on no-op
- subprocess: unblock/reset signals before running child process
- wayland: avoid doing unneccesary window resizes