fix minor bug related to c++11: erase function in a std::map now returns the next element
new fix which should work with and without c11
remove unused variables
Merge branch 'masterDGtal' into fixFrechetSimplification
small correction on unused variable
Merge branch 'masterDGtal' into fixFrechetSimplification
Merge pull request #823 from isivigno/fixFrechetSimplification

fix minor bug related to c++11: erase function in a std::map now returns...