cleanup some warnings

app/src/main/java/org/cocos2dx/lib/Cocos2dxRenderer.kt

@@ -94,8 +94,8 @@ class Cocos2dxRenderer(private var handler: Cocos2dxGLSurfaceView) : GLSurfaceVi
         } else {
             nativeRender()
 
-            var now = System.nanoTime()
-            var interval = now - this.lastTickInNanoSeconds
+            val now = System.nanoTime()
+            val interval = now - this.lastTickInNanoSeconds
 
             if (interval < animationInterval) {
                 try {

app/src/main/java/org/cocos2dx/lib/Cocos2dxTypefaces.kt

@@ -10,8 +10,9 @@ object Cocos2dxTypefaces {
 
     @Synchronized
     operator fun get(pContext: Context, pAssetName: String): Typeface? {
-        var typeface: Typeface?
-        var typeface2: Typeface
+        val typeface: Typeface?
+        val typeface2: Typeface
+
         synchronized(Cocos2dxTypefaces::class.java) {
             if (!typefaceCache.containsKey(pAssetName)) {
                 typeface2 = if (pAssetName.startsWith("/")) {