PVS-Studio warning V512 for ReactOS

typedef WCHAR TCHAR,*PTCHAR;
TCHAR file_path[MAX_PATH];

#define MAX_PATH 260

LRESULT CALLBACK
WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )
{
  ...
  ZeroMemory( file_path, MAX_PATH );
  ...
}

This is what should have been written here: ZeroMemory( file_path, MAX_PATH * sizeof(TCHAR));


This suspicious code was found in ReactOS project by PVS-Studio static code analyzer.
Warning message is:
V512 A call of the 'memset' function will lead to underflow of the buffer '((file_path))'. sndrec32 sndrec32.cpp 769

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/