LOG4PHP-178: Added typehint to Logger::setLevel()

git-svn-id: https://svn.apache.org/repos/asf/logging/log4php/trunk@1342867 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/php/Logger.php b/src/main/php/Logger.php
index 96f409c..b2df0dc 100644
--- a/src/main/php/Logger.php
+++ b/src/main/php/Logger.php
@@ -376,9 +376,12 @@
 	/**
 	 * Set the Logger level.
 	 *
+	 * Use LoggerLevel::getLevelXXX() methods to get a LoggerLevel object, e.g.
+	 * <code>$logger->setLevel(LoggerLevel::getLevelInfo());</code>
+	 *
 	 * @param LoggerLevel $level the level to set
 	 */
-	public function setLevel($level) {
+	public function setLevel(LoggerLevel $level) {
 		$this->level = $level;
 	}