CmdXfrBlockAPDU_extended(): Initialize local_rx_length
CmdXfrBlockAPDU_extended(): Initialize local_rx_length

Silence coverity: Event uninit_use_in_call: Using uninitialized value
"local_rx_length" when calling "CCID_Receive".


git-svn-id: d8b078d517c8be834637447f210d7177f0fa38d6@5829 0ce88b0d-b2fd-0310-8134-9614164e65ea

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