message: libtraceevent: Clang warning fixes
diff: @@ -4377,7 +4377,7 @@ static void print_bitmask_to_seq(struct tep_handle *tep,
  if (arg->hex.field->type == TEP_PRINT_DYNAMIC_ARRAY) {
  dynamic_offset_field(tep, arg->hex.field->dynarray.field, data,
  &offset, NULL);
  - hex = (char*) data + offset; /* gpuvis change! */
  + hex = (unsigned char*) data + offset; /* gpuvis change! */
  } else {
  field = arg->hex.field->field.field;
  if (!field) {
  @@ -4387,7 +4387,7 @@ static void print_bitmask_to_seq(struct tep_handle *tep,
  goto out_warning_field;
  arg->hex.field->field.field = field;
  }
  - hex = (char*) data + field->offset; /* gpuvis change! */
  + hex = (unsigned char*) data + field->offset; /* gpuvis change! */
  }
  len = eval_num_arg(data, size, event, arg->hex.size);
  for (i = 0; i < len; i++) {
  @@ -4874,7 +4874,7 @@ static int print_mac_arg(struct trace_seq *s, const char *format,
  return ret;
  }
  - buf = (char*) data + arg->field.field->offset; /* gpuvis change! */
  + buf = (unsigned char*) data + arg->field.field->offset; /* gpuvis change! */
  if (reverse)
  trace_seq_printf(s, fmt, buf[5], buf[4], buf[3], buf[2], buf[1], buf[0]);
  else
  