[LDAP] Check whether an entry attribute exists

Fixed bool/boolean coding standard

src/Symfony/Component/Ldap/Entry.php

@@ -35,6 +35,18 @@ class Entry
         return $this->dn;
     }
 
+    /**
+     * Returns whether an attribute exists.
+     *
+     * @param $name string The name of the attribute
+     *
+     * @return bool
+     */
+    public function hasAttribute($name)
+    {
+        return isset($this->attributes[$name]);
+    }
+
     /**
      * Returns a specific attribute's value.
      *