Merge pull request #18621 from dbudniko:gapi_ww43_2020_KW_fixes

modules/gapi/include/opencv2/gapi/media.hpp

@@ -51,6 +51,7 @@ public:
     View(Ptrs&& ptrs, Strides&& strs, Callback &&cb = [](){});
     View(const View&) = delete;
     View(View&&) = default;
+    View& operator = (const View&) = delete;
     ~View();
 
     Ptrs    ptr;

modules/gapi/test/common/gapi_core_tests_inl.hpp

@@ -618,7 +618,8 @@ TEST_P(SumTest, AccuracyTest)
 #undef countNonZero
 TEST_P(CountNonZeroTest, AccuracyTest)
 {
-    int out_cnz_gapi, out_cnz_ocv;
+    int out_cnz_gapi = -1;
+    int out_cnz_ocv = -2;
 
     // G-API code //////////////////////////////////////////////////////////////
     cv::GMat in;