message: Slight tweak to avoid gcc warning about slic::detail::false_value.
diff: @@ -604,10 +604,10 @@ namespace detail {
  ****************************************************************************
  * Variable of a type that evaluates as false.
  *
  - * \note Elides compiler warnings about constant expressions in Axom macros.
  + * \note Workaround for warnings about constant expressions in slic macros.
  ****************************************************************************
  */
  - static struct {
  + const struct {
  inline operator bool() const { return false; }
  } false_value;
  