Fix default stride value (#1559)

example/01_gemm/run_gemm_example_streamk_v2.inc

@@ -117,9 +117,9 @@ bool run_gemm(const ProblemType& problem_size, const ExecutionConfig& config)
 
     auto f_get_default_stride =
         [](std::size_t row, std::size_t col, ck::index_t stride, auto layout) {
-            if(stride == -1)
+            if(stride == 0)
             {
-                // give a chance if stride is -1, return a default packed stride
+                // give a chance if stride is 0, return a default packed stride
                 if constexpr(std::is_same_v<decltype(layout), ck::tensor_layout::gemm::RowMajor>)
                 {
                     return static_cast<std::size_t>(col);