message: Fix little typos in array indices
diff: @@ -211,7 +211,7 @@ time values:
  /* Reset the time value of all records */
  for (size_t i = 0; i < packets(coord); ++i) {
  - GPSRecord2<FloatP&> = packet(coord, n);
  + GPSRecord2<FloatP&> ref = packet(coord, i);
  ref.time = 0;
  }
  @@ -232,10 +232,10 @@ References can also be cast into their associated packet types and vice versa:
  .. code-block:: cpp
  /* Read a GPSRecord2<FloatP&> and convert to GPSRecord2<FloatP> */
  - GPSCoord2fP cp = packet(coord, n);
  + GPSCoord2fP cp = packet(coord, i);
  /* Assign a GPSRecord2<FloatP> to a GPSRecord2<FloatP&> */
  - packet(coord, n + 1) = cp;
  + packet(coord, i + 1) = cp;
  .. note::
  @@ -267,7 +267,7 @@ an increasing sequence:
  /* Set the i-th time value to 'i' */
  for (size_t i = 0; i < slices(coord); ++i) {
  - auto ref = slice(coord, n);
  + auto ref = slice(coord, i);
  ref.time = i;
  }
  