Fix wrong password message

This fixes a non existing error message if all authentication methods fail. Line 352 is calling <pre>aauth_error_login_failed</pre> but that is not in the lang line. This fix tries to match the naming used by the OP i.e. aauth_error_login_failed_xxx where xxx is the error (email/password).

application/libraries/Aauth.php

@@ -349,7 +349,7 @@ class Aauth {
 		// if not matches
 		else {
 
-			$this->error($this->CI->lang->line('aauth_error_login_failed'));
+			$this->error($this->CI->lang->line('aauth_error_login_failed_all'));
 			return FALSE;
 		}
 	}