Adding sanity checking to setup() callback for behaviors.

git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@8002 3807eeeb-6ff5-0310-8944-8be069107fe0

cake/libs/model/behavior.php

@@ -279,12 +279,15 @@ function attach($behavior, $config = array()) {
 				$this->{$name} =& new $class;
 			}
 		} elseif (isset($this->{$name}->settings) && isset($this->{$name}->settings[$this->modelName])) {
-			if ($config !== null && $config !== false) {
+			if (!empty($config)) {
 				$config = array_merge($this->{$name}->settings[$this->modelName], $config);
 			} else {
 				$config = array();
 			}
 		}
+		if (empty($config)) {
+			$config = array();
+		}
 		$this->{$name}->setup(ClassRegistry::getObject($this->modelName), $config);
 
 		foreach ($this->{$name}->mapMethods as $method => $alias) {