PVS-Studio warning V529 for Virtualdub

static ModuleInfo *CrashGetModules(void *&ptr) {
  ....
  while(*pszHeap++);
    if (pszHeap[-1]=='.')
      period = pszHeap-1;
  ....
}

This suspicious code was found in Virtualdub project by PVS-Studio static code analyzer.
Warning message is:
V529 Odd semicolon ';' after 'while' operator. VirtualDub crash.cpp 462

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/