BuildFormBootstrap.php: Signature BuildPill() adjusted.

extension/qfq/qfq/AbstractBuildForm.php

@@ -1997,7 +1997,7 @@ abstract class AbstractBuildForm {
     }
 
     /**
-     * Build Pill
+     * Build Pill:
      *
      * @param array $formElement
      * @param $htmlFormElementId

extension/qfq/qfq/BuildFormBootstrap.php

@@ -353,7 +353,7 @@ EOF;
      * @param $value
      * @return mixed
      */
-    public function buildPill(array $formElement, $htmlFormElementId, $value, &$json) {
+    public function buildPill(array $formElement, $htmlFormElementId, $value, array &$json) {
         $html = '';
         // save parent processed FE's
         $tmpStore = $this->feSpecNative;