message: Fixes warnings about signed/unsigned comparison in Sidre tests.
diff: @@ -903,7 +903,7 @@ TEST(sidre_view,int_array_depth_view)
  for (int id = 0 ; id < 4 ; ++id)
  {
  int * dv_ptr = views[id]->getData();
  - for (size_t i = 0 ; i < depth_nelems ; ++i)
  + for (SidreLength i = 0 ; i < depth_nelems ; ++i)
  {
  EXPECT_EQ(dv_ptr[i], id);
  }
  @@ -1120,12 +1120,12 @@ TEST(sidre_view,int_array_view_attach_buffer)
  // check values in field views...
  int * f0_ptr = field0->getData();
  - for (size_t i = 0 ; i < field_nelems ; ++i)
  + for (SidreLength i = 0 ; i < field_nelems ; ++i)
  {
  EXPECT_EQ(f0_ptr[i], 0);
  }
  int * f1_ptr = field1->getData();
  - for (size_t i = 0 ; i < field_nelems ; ++i)
  + for (SidreLength i = 0 ; i < field_nelems ; ++i)
  {
  EXPECT_EQ(f1_ptr[i], 1);
  }
  