fix GraphicBuffer::flatten crash issue when handle is null

Change-Id: I0d3727e4366cac355791e52cb7790bf8f3c51527
Signed-off-by: Jun Jiang <jun.a.jiang@intel.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/libs/ui/GraphicBuffer.cpp b/libs/ui/GraphicBuffer.cpp
index 96a7188..c4e4efa 100644
--- a/libs/ui/GraphicBuffer.cpp
+++ b/libs/ui/GraphicBuffer.cpp
@@ -235,8 +235,10 @@ status_t GraphicBuffer::flatten(void*& buffer, size_t& size, int*& fds, size_t&
 
     buffer = reinterpret_cast<void*>(static_cast<int*>(buffer) + sizeNeeded);
     size -= sizeNeeded;
-    fds += handle->numFds;
-    count -= handle->numFds;
+    if (handle) {
+        fds += handle->numFds;
+        count -= handle->numFds;
+    }
 
     return NO_ERROR;
 }