workaround for CTAD bug in NVC++ (#859)

Author: cliffburdick

include/matx/operators/cross.h

@@ -99,9 +99,9 @@ namespace matx
           auto idxOut = idx[idx.size() - 1];
 
           //create references to individual slices for ease of notation
-          cuda::std::array idx0(idx);
-          cuda::std::array idx1(idx);
-          cuda::std::array idx2(idx);
+          cuda::std::array idx0{idx};
+          cuda::std::array idx1{idx};
+          cuda::std::array idx2{idx};
 
           idx0[idx0.size() - 1] = 0LL;
           idx1[idx1.size() - 1] = 1LL;
@@ -197,4 +197,4 @@ namespace matx
   __MATX_INLINE__ auto cross(const OpA &A, const OpB &B) {
     return detail::CrossOp(A, B);
   }
-} // end namespace matx
+} // end namespace matx