Fixed missing type when using erode feature (#2613)
Fixed missing type when using erode feature (#2613)

* sct_maths: Fixed missing type argument

* sct_maths: Set int as default type and clarified doc

neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox