message: Change the check in update_stack_height to be similar to other functions
  validate_result_count and validate_branch_stack_height have similar checks.
diff: @@ -91,7 +91,7 @@ parser_result<uint8_t> parse_blocktype(const uint8_t* pos, const uint8_t* end)
  void update_stack_height(ControlFrame& frame, int stack_height_required, int stack_height_change)
  {
  - if ((frame.stack_height - frame.parent_stack_height) < stack_height_required)
  + if (frame.stack_height < frame.parent_stack_height + stack_height_required)
  {
  // Stack is polymorphic after unreachable instruction: underflow is ignored,
  // but we need to count stack growth to detect extra values at the end of the block.
  