PVS-Studio warning V501 for ReactOS

static HRESULT WINAPI
JScriptSafety_SetInterfaceSafetyOptions(....)
{
  ...
  This->safeopt = dwEnabledOptions & dwEnabledOptions;
  ...
}

This suspicious code was found in ReactOS project by PVS-Studio static code analyzer.
Warning message is:
V501 There are identical sub-expressions to the left and to the right of the '&' operator: dwEnabledOptions & dwEnabledOptions jscript jscript.c 905

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/