Update checkother.cpp

Author: chrchr-github

lib/checkother.cpp

@@ -2924,6 +2924,9 @@ void CheckOther::checkDuplicateExpression()
             if (tok->isOp() && tok->astOperand1() && !Token::Match(tok, "+|*|<<|>>|+=|*=|<<=|>>=") && !isInsideLambdaCaptureList(tok)) {
                 if (Token::Match(tok, "==|!=|-") && astIsFloat(tok->astOperand1(), true))
                     continue;
+                if (tok->isArithmeticalOp() &&
+                    (tok->astOperand1()->isEnumerator() || (tok->astOperand2() && tok->astOperand2()->isEnumerator())))
+                    continue;
                 const bool pointerDereference = (tok->astOperand1() && tok->astOperand1()->isUnaryOp("*")) ||
                                                 (tok->astOperand2() && tok->astOperand2()->isUnaryOp("*"));
                 const bool followVar = (!isConstVarExpression(tok) || Token::Match(tok, "%comp%|%oror%|&&")) && !pointerDereference;