[Decode] fix one kw issue

member not initialized

Change-Id: Id0faa0a2da33b148e13a58e204d224114c98f23c
diff --git a/media_driver/media_driver_next/agnostic/gen12/codec/hal/dec/av1/features/decode_av1_filmgrain_feature_g12.h b/media_driver/media_driver_next/agnostic/gen12/codec/hal/dec/av1/features/decode_av1_filmgrain_feature_g12.h
index ea537d4..f766384 100644
--- a/media_driver/media_driver_next/agnostic/gen12/codec/hal/dec/av1/features/decode_av1_filmgrain_feature_g12.h
+++ b/media_driver/media_driver_next/agnostic/gen12/codec/hal/dec/av1/features/decode_av1_filmgrain_feature_g12.h
@@ -304,7 +304,7 @@
     uint32_t                        m_kernelSize[kernelNum];                                            //!< Kernel size
     MHW_KERNEL_STATE                m_kernelStates[kernelNum];                                          //!< Kernel state
     uint32_t                        m_dshSize[kernelNum];                                               //!< DSH size
-    MOS_RESOURCE                    m_syncObject;                                                       //!< Sync Object
+    MOS_RESOURCE                    m_syncObject = {};                                                  //!< Sync Object
 
     //!
     //! \brief    Initialize state heap settings and kernel params