PVS-Studio warning V681 for Wine

static BOOL dump_msft_custdata(seg_t *seg)
{
  ....
  printf("\\%2.2x \\%2.2x\n", tlb_read_byte(), tlb_read_byte());
  ....
}

This suspicious code was found in Wine project by PVS-Studio static code analyzer.
Warning message is:
V681 The language standard does not define an order in which the 'tlb_read_byte' functions will be called during evaluation of arguments. tlb.c 650

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/