Update astutils.cpp

Author: chrchr-github

lib/astutils.cpp

@@ -1991,6 +1991,8 @@ bool isConstFunctionCall(const Token* ftok, const Library& library)
         return true;
     if (!Token::Match(ftok, "%name% ("))
         return false;
+    if (ftok->isStandardType())
+        return true;
     if (const Function* f = ftok->function()) {
         if (f->isAttributePure() || f->isAttributeConst())
             return true;