MSVC patch: s/INVALID_FILE_HANDLE/INVALID_HANDLE_VALUE/g

[Michael Goffioul]

INVALID_FILE_HANDLE is not part of the Win32 API (at least for VCExpress 2005).

Index: src/sysdep.cc
===================================================================
RCS file: /cvs/octave/src/sysdep.cc,v
retrieving revision 1.127
diff -c -p -c -r1.127 sysdep.cc
*** src/sysdep.cc       27 Apr 2007 17:34:28 -0000      1.127
--- src/sysdep.cc       25 May 2007 09:13:06 -0000
*************** same_file_internal (const std::string& f
*** 244,256 ****
   hfile1 = CreateFile (file1.c_str (), 0, FILE_SHARE_READ, 0,
                      OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);

!   if (hfile1 == INVALID_FILE_HANDLE)
     return false;

   hfile2 = CreateFile (file2.c_str (), 0, FILE_SHARE_READ, 0,
                      OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);

!   if (hfile2 == INVALID_FILE_HANDLE)
     {
       CloseHandle (hfile1);
       return false;
--- 244,256 ----
   hfile1 = CreateFile (file1.c_str (), 0, FILE_SHARE_READ, 0,
                      OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);

!   if (hfile1 == INVALID_HANDLE_VALUE)
     return false;

   hfile2 = CreateFile (file2.c_str (), 0, FILE_SHARE_READ, 0,
                      OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);

!   if (hfile2 == INVALID_HANDLE_VALUE)
     {
       CloseHandle (hfile1);
       return false;