we still support JDK1.5 I think, tweak patch for OF-342

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@13275 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/http/HttpBindManager.java

@@ -300,7 +300,7 @@ public final class HttpBindManager {
     }
     
     public void setCORSAllowOrigin(String origins) {
-        if (origins == null || origins.trim().isEmpty())
+        if (origins == null || origins.trim().length() == 0)
              origins = HTTP_BIND_CORS_ALLOW_ORIGIN_DEFAULT;
         else {
             origins = origins.replaceAll("\\s+", "");