bugfix:width、height有可能是""的问题修复

src/main/java/com/tptj/tool/hg/fineui/swing/element/LabelElement.java

@@ -43,12 +43,16 @@ public class LabelElement extends AbstractElement<UILabel> {
         }
         Dimension dim = getComponent().getPreferredSize();
         if ("width".equals(name)) {
+            if (val.length() > 0) {
                 dim.width = Integer.parseInt(val);
                 getComponent().setPreferredSize(dim);
             }
+        }
         if ("height".equals(name)) {
+            if (val.length() > 0) {
                 dim.height = Integer.parseInt(val);
                 getComponent().setPreferredSize(dim);
             }
         }
     }
+}