Fix maxdepth calculation on replan

[Robert Helling]

Hi,

-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-Start-with-0-when-computing-maxdepth-when-fixing-up.patch
Type: application/octet-stream
Size: 1054 bytes
Desc: not available
URL: <http://lists.subsurface-divelog.org/pipermail/subsurface/attachments/20141103/1821c6aa/attachment.obj>
-------------- next part --------------

the maximal depth of a dive was not correctly calculated when replanting made it shallower.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 496 bytes
Desc: Message signed with OpenPGP using GPGMail
URL: <http://lists.subsurface-divelog.org/pipermail/subsurface/attachments/20141103/1821c6aa/attachment.sig>