rolling back previous solution; throwing exception if database connection was not successful.

Author: halmai

system/core/Loader.php

@@ -361,10 +361,6 @@ public function database($params = '', $return = FALSE, $query_builder = NULL)
 
 		// Load the DB class
 		$CI->db =& DB($params, $query_builder);
-		if (!$CI->db->conn_id) 
-		{
-			return FALSE;
-		}
 		return $this;
 	}
 

system/database/DB_driver.php

@@ -436,7 +436,7 @@ public function initialize()
 					$this->display_error('db_unable_to_connect');
 				}
 
-				return FALSE;
+				throw new RuntimeException('Database connection failure.');
 			}
 		}