fixes that overwriting elements with cxMapPut() in a kv-list did not work

fixes critical memory leak when using cxMapFree() on a kv-list that is using destructors

add .clang-tidy file to mute warnings about using NULL instead of nullptr

(0) -1000 -300 -100 -30 -10 -3 +3 +10 +30 tip

mercurial