修复dxf报错

railway-business/src/main/java/com/railway/business/catenary/domain/BusJcbFdfxjyq.java

@@ -141,7 +141,11 @@ public class BusJcbFdfxjyq extends BusJcab{
     private String sbztDesc;
 
     public BigDecimal getDxlzxpy(){
-        return pointB.add(pointG).divide(new BigDecimal("2")).setScale(2,BigDecimal.ROUND_HALF_UP);
+        if(pointB!=null&&pointG!=null){
+            return pointB.add(pointG).divide(new BigDecimal("2")).setScale(2,BigDecimal.ROUND_HALF_UP);
+        }else{
+            return null;
+        }
     }
 
     public String getJybjzt(){