OpenCL RAR kernel accidentally got max length limited to 16. Bump to
22 again, it does not affect performance now.
Merge branch 'bleeding-jumbo' into memdbg

* bleeding-jumbo:
  OpenCL RAR kernel accidentally got max length limited to 16. Bump to 22 again, it does not affect performance now.

Conflicts:
	src/opencl_rar_fmt.c