Replaces a polygon loop in the specified position.
eAmbiguousInput — if excludeCrossing is true and there are crosses between loops;
This method replaces behavior such as: e.g.: storeCopyLoop(loopIndex); removeMPolygonLoopAt(loopIndex); if(insertMPolygonLoopAt(loopIndex, ...) != eOk) restoreCopyLoop(loopIndex);