message: Fix compilation warning about int/uintptr casts
diff: @@ -438,10 +438,10 @@ private:
  else
  {
  // modification
  - if(row > modRowMask)
  + if(quintptr(row) > modRowMask)
  qCritical() << "Packing failure - more than 255 modifications in one event";
  - return ((parent.internalId() & eventRowMask) << modRowBits) | (row & modRowMask);
  + return ((parent.internalId() & eventRowMask) << modRowBits) | (quintptr(row) & modRowMask);
  }
  }
  