tree 2701a11430b46ac5a16b155dd9b7e01f13cd04a4
parent 5381ddcfa61bdf218e774a4f874adf2c1dc16888
author zheilbron <zheilbron@gmail.com> 1386368794 -0800
committer zheilbron <zheilbron@gmail.com> 1386368794 -0800

change spatial type constructors to return null if a null argument is passed in