refactor(Core): apply clang-tidy modernize-use-nullptr (#3819)

src/common/Collision/Management/VMapManager2.h

@@ -52,7 +52,7 @@ namespace VMAP
     class ManagedModel
     {
     public:
-        ManagedModel() : iModel(0), iRefCount(0) { }
+        ManagedModel() : iModel(nullptr), iRefCount(0) { }
         void setModel(WorldModel* model) { iModel = model; }
         WorldModel* getModel() { return iModel; }
         void incRefCount() { ++iRefCount; }