PVS-Studio warning V220 for TortoiseSVN

void LoginDialog::CreateModule(void)
{
  ....
  DialogBoxParam(g_hmodThisDll, MAKEINTRESOURCE(IDD_LOGIN),
                 g_hwndMain, (DLGPROC)(LoginDialogProc),
                 (long)this);
  ....
}

This suspicious code was found in TortoiseSVN project by PVS-Studio static code analyzer.
Warning message is:
V220 Suspicious sequence of types castings: memsize -> 32-bit integer -> memsize. The value being casted: 'this'. logindialog.cpp 105

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/