CO_driver init message buffers are only partly initialized

[martinwag]

In CO_CANmodule_init() function, rxArray[] is only partly initialized. When not all elements are initialized by the following CANopenNode init functions, undefined behaviour occurs upon message reception.
This causes a problem for me on implementing LSS. In normal operation all elements are initialized correctly. But with LSS, there is a case where only LSS is initialized and the rest of the stack is not (Startup without valid node ID).
I've solved this by defaulting all values of the array as followed:

  for(i=0U; i<rxSize; i++){
      rxArray[i].ident = 0U;
      rxArray[i].mask = 0xFFFFFFFF;
      rxArray[i].object = NULL;
      rxArray[i].pFunct = NULL;
  }

Mask must be set to not mask out any bits as otherwise software filter in
if(((rcvMsgIdent ^ buffer->ident) & buffer->mask) == 0U){
will always match when buffer is not set up by stack.

For me this works as expected, but I don't know if we can just apply that to all the other avaliable drivers. There shouldn't be a problem as those values currently contain "random" values, but who knows...

txArray[] is also only partially initialzied. However, I think this is not a problem because those entries are only used after initialization.

[martinwag]

merged in 8b01062