If sdk_version is missing, consider it old in server.tsx

Summary: Just noticed this. There are probably not many version 0's around, but if there are they should be treated as old.

Reviewed By: passy

Differential Revision: D17397155

fbshipit-source-id: fab6f8b2557ecb983441b282ceb29b5b744ae900

src/server.tsx

@@ -318,7 +318,7 @@ class Server extends EventEmitter {
       // section because it refers to the name given by client which is not fixed
       // for android emulators, so it is indicated as outdated so that developers
       // might want to update SDK to get rid of this connection swap problem
-      if (query.sdk_version && query.sdk_version < 3) {
+      if (!query.sdk_version || query.sdk_version < 3) {
         query.app += ' (Outdated SDK)';
       }