更改促销条件

go/gopath/src/fohow.com/apps/helpers/promotion_helper.go

@@ -126,9 +126,9 @@ func max(vals ...int64) int64 {
 }
 
 func min(vals ...int64) int64 {
-	var min int64
+	min := int64(0)
 	for _, val := range vals {
-		if val <= min {
+		if val <= min || min == int64(0) {
 			min = val
 		}
 	}