Fixed JsonVariant::is<bool>() that was incorrectly returning false (issue #214)

test/Issue214.cpp

@@ -0,0 +1,16 @@
+// Copyright Benoit Blanchon 2014-2016
+// MIT License
+//
+// Arduino JSON library
+// https://github.com/bblanchon/ArduinoJson
+// If you like this project, please add a star!
+
+#include <ArduinoJson.h>
+#include <gtest/gtest.h>
+
+TEST(Issue214, IsBool) {
+  char json[] = "{\"ota\": {\"enabled\": true}}";
+  StaticJsonBuffer<JSON_OBJECT_SIZE(1) + JSON_OBJECT_SIZE(1)> jsonBuffer;
+  JsonObject& parsedJson = jsonBuffer.parseObject(json);
+  ASSERT_TRUE(parsedJson["ota"]["enabled"].is<bool>());
+}