Remove const_cast to layer handle

Change-Id: Ica1e089cb56b5f9f46ab87abf735ffe7237fc926
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 7be58c6..145618e 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -231,7 +231,7 @@
         hwcl->handle = NULL;
         return;
     }
-    hwcl->handle = const_cast<native_handle_t*>(buffer->handle);
+    hwcl->handle = buffer->handle;
     // TODO: set the crop value properly
     hwcl->sourceCrop.left   = 0;
     hwcl->sourceCrop.top    = 0;