build: fix/eliminate MSVC warnings

modules/core/include/opencv2/core/types.hpp

@@ -57,6 +57,11 @@
 #include "opencv2/core/cvstd.hpp"
 #include "opencv2/core/matx.hpp"
 
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4459)  // declaration of '...' hides global declaration
+#endif
+
 namespace cv
 {
 
@@ -2445,4 +2450,8 @@ TermCriteria::TermCriteria(int _type, int _maxCount, double _epsilon)
 
 } // cv
 
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
 #endif //OPENCV_CORE_TYPES_HPP

modules/core/test/test_intrin_utils.hpp

@@ -1081,7 +1081,7 @@ template<typename R> struct TheTest
         typedef typename VTraits<uint_reg>::lane_type uint_type;
 
         Data<R> dataA, dataB(0), dataC, dataD(1), dataE(2);
-        dataA[0] = std::numeric_limits<int_type>::max();
+        dataA[0] = (LaneType)std::numeric_limits<int_type>::max();
         dataA[1] *= (LaneType)-1;
         union
         {