Memory Leak in DMatrix

[bduclaux]

Hello,

There is a memory leak in the C++ Implementation of DMatrix.
The C++ destructor of DMatrix should delete every element of the SparseRow vector:
std::vector<SparseRow*> row;

A call to this->Reset() in the DMatrix destructor should suffice to fix the leak.
See data_structure.h line 147.

Best