QmlJSCheck: Add error for mixing translation functions

Change-Id: I0f5fd2edf2d8bf13938d9e18eadada5c8c1b85f2
Reviewed-by: Tapani Mattila <tapani.mattila@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/libs/qmljs/qmljscheck.h

@@ -152,11 +152,14 @@ private:
         bool wasSuppressed;
     };
 
+    enum TranslationFunction { qsTr, qsTrId, qsTranslate, noTranslationfunction };
+
     QHash< int, QList<MessageTypeAndSuppression> > m_disabledMessageTypesByLine;
 
     bool _importsOk;
     bool _inStatementBinding;
     const Imports *_imports;
+    TranslationFunction lastTransLationfunction = noTranslationfunction;
 };
 
 } // namespace QmlJS