Update HtmlEmoji.php

Author: jcheron

Ajax/semantic/html/elements/HtmlEmoji.php

@@ -64,12 +64,12 @@ public function asLink($href=NULL,$target=NULL) {
 		return $this->addToProperty("class", "link");
 	}
 
-	public function addLabel($label, $before, $emoji) {
+	public function addLabel($label, $before=false, $emoji=null) {
 		if($before)
 			$this->wrap($label);
 		else
 			$this->wrap("", $label);
-		if(isset($emoji))
+		if($emoji!=null)
 			$this->setEmoji($emoji);
 		return $this;
 	}