Fix console spew from Qml complaints

src/PlanView/MissionItemStatus.qml

@@ -31,7 +31,7 @@ Rectangle {
     readonly property real _margins: ScreenTools.defaultFontPixelWidth
 
     onMaxWidthChanged: {
-        var calcLength = (statusListView.count + 1)*statusListView.contentItem.children[0].width
+        var calcLength = (statusListView.count + 1) * (statusListView.count ? statusListView.contentItem.children[0].width : 1)
         root.width = root.maxWidth > calcLength ? calcLength : root.maxWidth
     }
 
@@ -63,7 +63,7 @@ Rectangle {
         currentIndex:           _missionController.currentPlanViewIndex
 
         onCountChanged: {
-            var calcLength = (statusListView.count + 1)*statusListView.contentItem.children[0].width
+            var calcLength = (statusListView.count + 1) * (statusListView.count ? statusListView.contentItem.children[0].width : 1)
             root.width = root.maxWidth > calcLength ? calcLength : root.maxWidth
         }