Fix build error.

Signed-off-by: Shiyu Li <[email protected]>

Author: timlee0212

cpp/tensorrt_llm/runtime/mcastDeviceMemory.h

@@ -96,12 +96,12 @@ class McastDeviceMemory
     size_t mSignalPadOffset;
     size_t mAllocationSize;
 
-    tensorrt_llm::mpi::MpiComm mGroupComm; //!< The MPI communicator for the group
-
     CUdeviceptr mMcPtr;
     CUmemGenericAllocationHandle mMcHandle;
     std::vector<CUmemGenericAllocationHandle> mUcHandles;
 
+    tensorrt_llm::mpi::MpiComm mGroupComm; //!< The MPI communicator for the group
+
     // Host array of pointers
     std::vector<CUdeviceptr> mUcPtrs;
     std::vector<CUdeviceptr> mSignalPads;