fix(#17):修复有绑定表计的商户迁出时无法迁出的错误

vo/reading.go

@@ -4,7 +4,6 @@ import (
 	"electricity_bill_calc/model"
 	"electricity_bill_calc/types"
 	"fmt"
-
 	"github.com/shopspring/decimal"
 )
 
@@ -19,7 +18,8 @@ type MeterReadingForm struct {
 
 func (r MeterReadingForm) Validate() bool {
 	flat := r.Overall.Sub(r.Critical).Sub(r.Peak).Sub(r.Valley)
-	return flat.GreaterThanOrEqual(decimal.Zero)
+	b := flat.GreaterThanOrEqual(decimal.Zero)
+	return b
 }
 
 type MeterReadingFormWithCode struct {