fix nativenet payload pointer
initalize transceiver_buffer properly
Merge pull request #187 from LudwigOrtmann/nativenet_fix_packet

fix nativenet payload pointer init
Merge pull request #186 from LudwigOrtmann/transceiver_init_buffer

initalize transceiver_buffer properly
Fix uninitialized packet members
also cast packet data explicitly
Merge pull request #188 from LudwigOrtmann/native_fix_uninitialized_packet_members

Fix uninitialized packet members