Update vf_settokenvalue.cpp

Author: chrchr-github

lib/vf_settokenvalue.cpp

@@ -428,6 +428,21 @@ namespace ValueFlow
                         setTokenValue(parent, std::move(value), settings);
                 }
             } else if (!value.isImpossible()) {
+                // is condition only depending on 1 variable?
+                nonneg int varId = 0;
+                bool ret = false;
+                visitAstNodes(parent->astOperand1(),
+                              [&](const Token *t) {
+                    if (t->varId()) {
+                        if (varId > 0)
+                            ret = true;
+                        varId = t->varId();
+                    } else if (t->str() == "(" && Token::Match(t->previous(), "%name%"))
+                        ret = true; // function call
+                    return ret ? ChildrenToVisit::done : ChildrenToVisit::op1_and_op2;
+                });
+                if (ret)
+                    return;
                 value.conditional = true;
                 value.changeKnownToPossible();