PVS-Studio warning V531 for CrashRpt

BOOL CHttpRequestSender::InternalSend()
{
  ....
  TCHAR szBuffer[1024]=_T("");
  DWORD dwBuffSize = sizeof(szBuffer)*sizeof(TCHAR);
  ....
}

This suspicious code was found in CrashRpt project by PVS-Studio static code analyzer.
Warning message is:
V531 It is odd that a sizeof() operator is multiplied by sizeof(). httprequestsender.cpp 286

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/