Fix unit test for new signalling

src/MissionManager/QGCMapPolygonTest.cc

@@ -122,7 +122,12 @@ void QGCMapPolygonTest::_testVertexManipulation(void)
         QCOMPARE(_mapPolygon->count(), i);
 
         _mapPolygon->appendVertex(_polyPoints[i]);
-        QVERIFY(_multiSpyPolygon->checkOnlySignalByMask(pathChangedMask | polygonDirtyChangedMask | polygonCountChangedMask | centerChangedMask));
+        if (i >= 2) {
+            // Center is no recalculated until there are 3 points or more
+            QVERIFY(_multiSpyPolygon->checkOnlySignalByMask(pathChangedMask | polygonDirtyChangedMask | polygonCountChangedMask | centerChangedMask));
+        } else {
+            QVERIFY(_multiSpyPolygon->checkOnlySignalByMask(pathChangedMask | polygonDirtyChangedMask | polygonCountChangedMask));
+        }
         QVERIFY(_multiSpyModel->checkOnlySignalByMask(modelDirtyChangedMask | modelCountChangedMask));
         QCOMPARE(_multiSpyPolygon->pullIntFromSignalIndex(polygonCountChangedIndex), i+1);
         QCOMPARE(_multiSpyModel->pullIntFromSignalIndex(modelCountChangedIndex), i+1);