title: gson.fromJson bug? Can not parse valid json
body: <p>Method </p>
  
  <pre><code>private boolean isJSONValid(String test) {
      try {
          gson.fromJson(test, Object.class);
          return true;
      } catch (com.google.gson.JsonSyntaxException ex) {
          return false;
      }
  }
  </code></pre>
  
  <p>returns false on this JSON - <code>{"R":"CsIGAADwPxIESS5PSw==","I":"70"}</code>
  I believe this is normal JSON, prove me if it doesn't, and tell please why</p>