fix warnings

containment/package/contents/ui/colorizer/CustomBackground.qml

@@ -63,7 +63,7 @@ Item{
         property: "topBorder"
         when: dock
         value: {
-            return ((dock.enabledBorders & PlasmaCore.FrameSvg.TopBorder) > 0);
+            return ((dock && (dock.enabledBorders & PlasmaCore.FrameSvg.TopBorder)) > 0);
         }
     }
 
@@ -72,7 +72,7 @@ Item{
         property: "leftBorder"
         when: dock
         value: {
-            return ((dock.enabledBorders & PlasmaCore.FrameSvg.LeftBorder) > 0);
+            return ((dock && (dock.enabledBorders & PlasmaCore.FrameSvg.LeftBorder)) > 0);
         }
     }
 
@@ -81,7 +81,7 @@ Item{
         property: "bottomBorder"
         when: dock
         value: {
-            return ((dock.enabledBorders & PlasmaCore.FrameSvg.BottomBorder) > 0);
+            return ((dock && (dock.enabledBorders & PlasmaCore.FrameSvg.BottomBorder)) > 0);
         }
     }
 
@@ -90,7 +90,7 @@ Item{
         property: "rightBorder"
         when: dock
         value: {
-            return ((dock.enabledBorders & PlasmaCore.FrameSvg.RightBorder) > 0);
+            return ((dock && (dock.enabledBorders & PlasmaCore.FrameSvg.RightBorder)) > 0);
         }
     }
 
@@ -98,7 +98,6 @@ Item{
         id: painter
         anchors.verticalCenter: parent.verticalCenter
         anchors.horizontalCenter: parent.horizontalCenter
-        anchors.verticalCenterOffset: -centerStep
 
         width: {
             if (plasmoid.formFactor === PlasmaCore.Types.Horizontal) {
@@ -156,6 +155,8 @@ Item{
                                 return -centerStep;
                             }
                         }
+
+                        return 0;
                     }
                     anchors.verticalCenterOffset: {
                         if (drawWithoutRoundness) {