smaller bugfix for max

src/fieldUpload.riot

@@ -111,10 +111,8 @@
              */
             handleSelectFile(event)
             {
-                let index = 0
-
                 for (const file of event.target.files) {
-                    if (!this.props.max || (this.props.max && (((index++) + 1) <= this.props.max))) {
+                    if (!this.props.max || (this.props.max && (this.state.files.length < this.props.max))) {
                         this.state.files.push(file)
                     }
                 }