tst_linebylinelex: Hotfix: skip test if no test data is found

The test looks in the wrong place for the test data. As a hot-fix, skip
the test if no test-data is found to avoid a subsequent assert.

Task-number: QTBUG-105697
Change-Id: Ib7a38faec123662fb1ea9fad8d0da60ede074486
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

tests/auto/qml/linebylinelex/tst_linebylinelex.cpp

@@ -67,10 +67,14 @@ void TestLineByLineLex::testFormatter_data()
 {
     QTest::addColumn<QString>("filename");
     QDir formatData(m_baseDir + u"/qmlformat/data"_s);
+    bool hasTestData = false; // ### TODO: fix test to always have data
     for (const QFileInfo &fInfo :
          formatData.entryInfoList(QStringList({ u"*.qml"_s, u"*.js"_s }), QDir::Files)) {
         QTest::newRow(qPrintable(fInfo.fileName())) << fInfo.absoluteFilePath();
+        hasTestData = true;
     }
+    if (!hasTestData)
+        QSKIP("No test data found!");
 }
 
 void TestLineByLineLex::testFormatter()