[SofaImage.API] clean rasterization of ROIs and closing
[SofaImage.API] clean rasterization of ROIs and closing

Add a warning when both ROIs and closing are to be painted, this is the
same behavior as before, just adding the warning.
This is nearly possible (committed commented code)
just is missing to instanciate MergeVectors on SVector<unsigned int> but
I faced compilation issues when trying to add SVector<T> to Sofa's
template (file DataTypeInfo.h)

Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa