[Cbc] Incorrect deletion in CbcModel::convertToDynamic()

[fmargot at andrew.cmu.edu]

in CbcModel::convertToDynamic() in file CbcModel.cpp line

6943 delete object_[iObject];

should be moved after line 6952

as lines 6950 and 6951 access object_[iObject]

This affects both stable 2.0 and release 2.0.0. A ticket (#47) has been filed.

Francois