Access array elements before Cross border inspection

[blueothershore]

DeviceClass_t devClass = MacCtx.NvmCtx->MulticastChannelList[groupID].ChannelParams.Class; Before executing this line of code, we'd better first check if the array is out of bounds, rather than placing a check after this line of code. Code modification: Swap the code position to advance the check for array out of bounds to the front of array access

[tencent-adm]

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