线元数据问题修复

blade-service-api/blade-business-api/src/main/java/org/springblade/business/entity/Mileagexy.java

@@ -26,7 +26,7 @@ public class Mileagexy   extends TenantEntity {
 	private String projectId;		// projId
 	private String notes;		// notes
 	private String code;		// 编号
-	private Double value;		// 里程
+	private Double value=0.0;		// 里程
 	private Double x=0.0;		// x
 	private Double y=0.0;		// y
 	private Double r=0.0;		// 半径