Build #422 (Mar 6, 2017 2:54:11 AM)

1. mlv_lite: fix invalid header under certain conditions involving very fast button presses
   example: select a resolution higher than maximum, zoom in, return from zoom and press record very quickly
   http://www.magiclantern.fm/forum/index.php?topic=19108 (detail / bitbucket)

Started by an SCM change