CHART-16481 增加空判断

designer-chart/src/main/java/com/fr/van/chart/designer/style/axis/VanChartBaseAxisPane.java

@@ -591,6 +591,7 @@ public class VanChartBaseAxisPane extends FurtherBasicBeanPane<VanChartAxis> {
     }
 
     protected void checkLabelGapPane() {
+        if (labelGapPane != null) {
             boolean visible = true;
 
             if (showLabelDisplay() && labelDisplayPane != null && labelDisplayComboBox != null) {
@@ -599,6 +600,7 @@ public class VanChartBaseAxisPane extends FurtherBasicBeanPane<VanChartAxis> {
 
             labelGapPane.setVisible(visible);
         }
+    }
 
     protected void checkLabelGapValuePane() {
         if (labelGapValuePane != null && labelGapStyle != null) {