fix feedlist init for IE

feedlist.js

@@ -197,6 +197,6 @@ function init() {
 		document.onkeydown = hotkey_handler;
 		parent.setTimeout("timeout()", 1000);
 	} catch (e) {
-		exception_error("feedlist/init()", e);
+		exception_error("feedlist/init", e);
 	}
 }

functions.js

@@ -496,6 +496,8 @@ function hideOrShowFeeds(doc, hide) {
 
 	var css_rules = doc.styleSheets[0].cssRules;
 
+	if (!css_rules || !css_rules.length) return;
+
 	for (i = 0; i < css_rules.length; i++) {
 		var rule = css_rules[i];