Revert "Fixed a bug in FLANN resulting in uninitialized accesses."

This reverts commit a9975b14, to prepare
for cherry-picking upstream's solution.

modules/flann/include/opencv2/flann/any.h

@@ -257,7 +257,8 @@ public:
     const T& cast() const
     {
         if (policy->type() != typeid(T)) throw anyimpl::bad_any_cast();
-        T* r = reinterpret_cast<T*>(policy->get_value(const_cast<void **>(&object)));
+        void* obj = const_cast<void*>(object);
+        T* r = reinterpret_cast<T*>(policy->get_value(&obj));
         return *r;
     }