Update astutils.cpp

Author: chrchr-github

lib/astutils.cpp

@@ -3426,6 +3426,11 @@ static ExprUsage getFunctionUsage(const Token* tok, int indirect, const Settings
         if (ftok->variable()->type() && ftok->variable()->type()->classScope) {
             const int nCtor = ftok->variable()->type()->classScope->numConstructors;
             if (nCtor == 0)
+                if (indirect > 0) {
+                    std::vector<const Variable*> argvar = getArgumentVars(ftok->astParent(), argnr);
+                    if (argvar.size() == 1 && argvar[0]->valueType() && argvar[0]->valueType()->pointer == indirect)
+                        return ExprUsage::NotUsed;
+                }
                 return ExprUsage::Used;
             if (nCtor == 1) {
                 const Scope* scope = ftok->variable()->type()->classScope;