Add missing property declaration

src/HAB/Solr/Command/Search.php

@@ -53,6 +53,13 @@ class Search implements CommandInterface
      */
     private $query;
 
+    /**
+     * Result.
+     *
+     * @var RecordCollection
+     */
+    private $result;
+
     /**
      * Query builder.
      *
@@ -117,4 +124,4 @@ class Search implements CommandInterface
         }
         return $this->query;
     }
-}
+}
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