FIX : c++ < 201103L std::map<U,V>::erase method requires a non-const iterator.
FIX : c++ < 201103L std::map<U,V>::erase method requires a non-const iterator.

Signed-off-by: Étienne Schmitt <etienne.schmitt@inria.fr>

Former-commit-id: b33b50cecc891348467117c1a7d3e9c44de86ab5
FabienPean/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa,hdeling/sofa,hdeling/sofa,Anatoscope/sofa,FabienPean/sofa,hdeling/sofa,hdeling/sofa,hdeling/sofa,hdeling/sofa,hdeling/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,hdeling/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,hdeling/sofa,hdeling/sofa,Anatoscope/sofa,Anatoscope/sofa,FabienPean/sofa,Anatoscope/sofa,Anatoscope/sofa,FabienPean/sofa