[AD] div-by-zero... get_vector_rotation_quat()

[aj <aj@xxxxxxxxxx>]

get_vector_rotation_quat()

from  /allegro419/src/quat.c

has ASSERT(l != 0);
and a /* C comment */ in the file about possible problems when passing data=0.0

doesn't ASSERT only work during the debug runtime ?
what happens in a release build at runtime ?

if no code changes come of this, can the documentation say something about 
passing 0.0 and the potential for crash.