PVS-Studio warning V595 for ffdshow

Tsubtitle* TsubtitleParserSami::parse(....)
{
  ....
  for (; *s != '>' && *s != '\0'; s++) {
    ;    /* skip remains of non-<P> TAG */
  }
  if (s == '\0') {
    break;
  }
  ....
}

This is an example of errors detected indirectly. The programmer actually wanted to check this: if (*s == '\0'). However, this error can be found in a different way through the V528 message.

This suspicious code was found in ffdshow project by PVS-Studio static code analyzer.
Warning message is:
V595 The 's' pointer was utilized before it was verified against nullptr. tsubreadermplayer.cpp 151

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/