fix: prevent & conversion in text mode

plugins/quiqqer/quiqqerBricks/plugin.js

@@ -289,6 +289,10 @@
 
                 var placeholders = Ghost.getElements('.quiqqer_bricks_placeholder');
                 var brickId, textNode, PH;
+                
+                if (!placeholders.length) {
+                    return;
+                }
 
                 for (var i = 0, len = placeholders.length; i < len; i++) {
                     PH = placeholders[i];