[Search] Type checking

Added type checking for arrays to indexItems.

platform/search/src/GenericSearchProvider.js

@@ -130,7 +130,11 @@ define(
                         // This node has children
                         node.getCapability('composition').invoke().then(function (children) {
                             // Index the children
+                            if (children.constructor === Array) {
                                 indexItems(children);
+                            } else {
+                                indexItems([children]);
+                            }
                         });
                     }
                 });