Fix accessing deleted memory in OpenJO g_navigator.cpp - #1347
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…kupMap.clear(). This fixes a bug on single player level end where the CNode * pointers were being deleted but not removed from m_nodes, so the next iteration of m_nodes would access deleted memory. This also aligns codeJK2/g_navigator.cpp with codemp/navigator.cpp.
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Have CNavigator::Free() in codeJK2 call m_nodes.clear() and m_edgeLookupMap.clear(). This fixes a bug on single player level end where the CNode * pointers were being deleted in Free() but not removed from m_nodes, so the next iteration of m_nodes would access deleted memory. This also aligns codeJK2/g_navigator.cpp with codemp/navigator.cpp.