BitsPlusPlusTLockBlitterTest([screenId])
Test if the old style Bits++ T-Lock code generation and the new style
built-in T-Lock code generation yield identical results.
'screenId' == Display screen to test. Defaults to max(
Screen('Screens')).
This test should pass on all graphics hardware. If it fails on some
setup, we're interested in hearing from you.
Psychtoolbox/PsychTests/BitsPlusPlusTLockBlitterTest.m