Merge pull request #2731 from josephok/develop

Update CodeIgniter.php
diff --git a/system/database/DB_query_builder.php b/system/database/DB_query_builder.php
index f0fe96c..1d41a19 100644
--- a/system/database/DB_query_builder.php
+++ b/system/database/DB_query_builder.php
@@ -1338,7 +1338,7 @@
 	 * returned by an Query Builder query.
 	 *
 	 * @param	string
-	 * @return	string
+	 * @return	int
 	 */
 	public function count_all_results($table = '')
 	{