Merge "libgui: assign handle to NULL after free"
diff --git a/libs/ui/GraphicBuffer.cpp b/libs/ui/GraphicBuffer.cpp
index 72d390c..4fe0946 100644
--- a/libs/ui/GraphicBuffer.cpp
+++ b/libs/ui/GraphicBuffer.cpp
@@ -113,6 +113,7 @@
         GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
         allocator.free(handle);
     }
+    handle = NULL;
     mWrappedBuffer = 0;
 }