Abstracting the loading of files in the config directory depending on environments.
diff --git a/system/libraries/User_agent.php b/system/libraries/User_agent.php
index a007ace..4a29d7d 100644
--- a/system/libraries/User_agent.php
+++ b/system/libraries/User_agent.php
@@ -96,15 +96,10 @@
 	 */
 	private function _load_agent_file()
 	{
-		if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/user_agents.php'))
-		{
-			include(APPPATH.'config/'.ENVIRONMENT.'/user_agents.php');
-		}
-		elseif (is_file(APPPATH.'config/user_agents.php'))
-		{
-			include(APPPATH.'config/user_agents.php');
-		}
-		else
+		load_environ_config('user_agents');
+
+		// Return FALSE if we still have no mimes after trying to load them up.
+		if (count($this->mimes) === 0)
 		{
 			return FALSE;
 		}