new smatch

*** 76,91 ****
  {
          struct expression *tmp = NULL;
          struct expression *zero;
  
          // if left is zero or right is zero
!         if (is_zero(expr->left)) {
                  zero = strip_expr(expr->left);
                  if (zero->type != EXPR_VALUE)
                          __split_expr(expr->left);
                  tmp = expr->right;
!         } else if (is_zero(expr->right)) {
                  zero = strip_expr(expr->left);
                  if (zero->type != EXPR_VALUE)
                          __split_expr(expr->right);
                  tmp = expr->left;
          } else {
--- 76,91 ----
  {
          struct expression *tmp = NULL;
          struct expression *zero;
  
          // if left is zero or right is zero
!         if (expr_is_zero(expr->left)) {
                  zero = strip_expr(expr->left);
                  if (zero->type != EXPR_VALUE)
                          __split_expr(expr->left);
                  tmp = expr->right;
!         } else if (expr_is_zero(expr->right)) {
                  zero = strip_expr(expr->left);
                  if (zero->type != EXPR_VALUE)
                          __split_expr(expr->right);
                  tmp = expr->left;
          } else {