PVS-Studio warning V573 for Firebird

void realign(....)
{
  for (....)
  {
    UCHAR* p = buffer + field->fld_offset;
    ....
    for (const burp_fld* field = relation->rel_fields;
         field; field = field->fld_next)
    {
      ....
      UCHAR* p = buffer + FB_ALIGN(p - buffer, sizeof(SSHORT));
  ........
}

This suspicious code was found in Firebird project by PVS-Studio static code analyzer.
Warning message is:
V573 Uninitialized variable 'p' was used. The variable was used to initialize itself. restore.cpp 17535

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/