fix return

caddywebp.go

@@ -125,18 +125,18 @@ func (s Webp) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.H
 		return next.ServeHTTP(w, r)
 	}
 
-
+	b:=buf.Bytes()
 	fh,err:=os.Create(cacheFile)
-	fh.Write(buf.Bytes())
+	fh.Write(b)
 
-	buf.WriteTo(fh)
+//	buf.WriteTo(fh)
 	fh.Close()
 	w.Header().Set("content-Type", "image/webp")
 	w.Header().Add("webpstatus", "tocache")
 
 	w.WriteHeader(http.StatusOK)
-	w.Write(buf.Bytes())
-	buf.WriteTo(w)
+	w.Write(b)
+//	buf.WriteTo(w)
 	return nil
 }