PVS-Studio warning V514 for Scilab

void qsort(
  void *base,
  size_t num,     // Array size in elements.
  size_t width,   // Element size in bytes.
  int (__cdecl *compare )(const void *, const void *)
);

char *getCommonPart(char **dictionary, int sizeDictionary)
{
  ....
  char *currentstr = dictionary[0];
  qsort(dictionary, sizeof dictionary / sizeof dictionary[0],
        sizeof dictionary[0], cmp);
  ....
}

This suspicious code was found in Scilab project by PVS-Studio static code analyzer.
Warning message is:
V514 Dividing sizeof a pointer 'sizeof dictionary' by another value. There is a probability of logical error presence. getcommonpart.c 76

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/