Fix two gosec issues

request.go

@@ -9,6 +9,7 @@ package fiber
 
 import (
 	"encoding/base64"
+	"log"
 	"mime"
 	"mime/multipart"
 	"strings"
@@ -338,7 +339,9 @@ func (ctx *Ctx) Route() *Route {
 
 // SaveFile : https://gofiber.github.io/fiber/#/context?id=secure
 func (ctx *Ctx) SaveFile(fh *multipart.FileHeader, path string) {
-	fasthttp.SaveMultipartFile(fh, path)
+	if err := fasthttp.SaveMultipartFile(fh, path); err != nil {
+		log.Fatal(err)
+	}
 }
 
 // Secure : https://gofiber.github.io/fiber/#/context?id=secure

response.go

@@ -10,6 +10,7 @@ package fiber
 import (
 	"encoding/xml"
 	"fmt"
+	"log"
 	"path/filepath"
 	"strings"
 	"time"
@@ -141,7 +142,9 @@ func (ctx *Ctx) Format(args ...interface{}) {
 		case "html":
 			ctx.SendString("<p>" + body + "</p>")
 		case "json":
-			ctx.JSON(body)
+			if err := ctx.JSON(body); err != nil {
+				log.Fatal(err)
+			}
 		default:
 			ctx.SendString(body)
 		}