pioneerspacesim/pioneer — pull request #1873 by robn (2012-12-25 00:36:49+00:00)
Title: Give guided missiles some tiny side thrust to avoid division by zero

For #1872. This is a hack to fix the most common case. It doesn't fix the second case (ship with velocity zero at missile launch). I haven't done anything with the unguided rocket because its not supposed to move at all, so side thrust doesn't make sense. Really that needs to be rewritten to just be given initial velocity at spawn and nothing else.