PVS-Studio warning V575 for Firefox

pixman_bool_t
pixman_image_set_transform (....)
{
  memcmp (common->transform, transform,
          sizeof (pixman_transform_t) == 0))
}

This is what should have been written here: memcmp (common->transform, transform, sizeof (pixman_transform_t)) == 0)

This suspicious code was found in Firefox project by PVS-Studio static code analyzer.
Warning message is:
V575 The 'memcmp' function processes '0' elements. Inspect the third argument. pixman-image.c 520

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/