fix bug of get daemon

+# main config for srs.
+# @see full.conf for detail config.
+
+listen              1935;
+daemon              off;
+srs_log_tank        console;
+vhost __defaultVhost__ {
+}

@@ -1304,7 +1304,7 @@ bool SrsConfig::get_deamon()
 {
     srs_assert(root);
     
-    SrsConfDirective* conf = root->get("deamon");
+    SrsConfDirective* conf = root->get("daemon");
     if (conf && conf->arg0() == "off") {
         return false;
     }