Player not looking straight ahead on map start

Bisect-compiled to r8544-d8a523e5 / svn8551 & r8545-16fc20a5 / svn8552

r8544: the player's view "slides" into the correct position.

32-bit builds appear unaffected as of r8545.

Test suite with some example builds attached: vp029-BuildGameTest.7z

The bug is "turned off" when a valid md3 model (frame+skin) or (highres) texture is defined for a (any?) sprite of the test map.