lfsapi: ensure that 'retries' is a positive integer

lfsapi/client.go

@@ -15,6 +15,7 @@ import (
 
 	"github.com/git-lfs/git-lfs/config"
 	"github.com/git-lfs/git-lfs/errors"
+	"github.com/git-lfs/git-lfs/tools"
 	"github.com/rubyist/tracerx"
 )
 
@@ -130,6 +131,8 @@ func (c *Client) doWithRedirects(cli *http.Client, req *http.Request, via []*htt
 		retries = defaultRequestRetries
 	}
 
+	retries = tools.MaxInt(0, retries)
+
 	var res *http.Response
 
 	for i := 0; i < retries; i++ {