PVS-Studio warning V528 for CxImage

int jpc_atoaf(char *s, int *numvalues, double **values)
{
  ...
  while ((cp = strtok(0, delim))) {
    if (cp != '\0') {
      ++n;
    }
  }
  ...
  while ((cp = strtok(0, delim))) {
    if (cp != '\0') {
      vs[n] = atof(cp);
      ++n;
    }
  }
  ...
}

This is an example of a Copy-Paste code with an error. This is an example of vulnerability.
Pointer dereferencing is missing.
This is what should have been written here: (*cp != '\0').

This suspicious code was found in CxImage project by PVS-Studio static code analyzer.
Warning message is:
V528 It is odd that pointer to 'char' type is compared with the '\0' value. Probably meant: *cp != '\0'. jasper jpc_util.c 154

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/