win32: hold .0 file open exclusively

-prevents problems with internal recover
if second copy of game is started up with
the same player name.

sys/winnt/winnt.c

@@ -233,53 +233,6 @@ void win32_abort()
 #endif
 	abort();
 }
-
-#if !defined(WIN_CE)
-#include <tlhelp32.h>
-boolean
-is_NetHack_process(pid) 
-int pid;
-{ 
-    HANDLE hProcessSnap = NULL; 
-    PROCESSENTRY32 pe32      = {0};
-    boolean bRet      = FALSE; 
-    HINSTANCE hinstLib; 
-    genericptr_t ProcTest; 
-    BOOL fFreeResult; 
- 
-    hinstLib = LoadLibrary("KERNEL32"); 
-    if (hinstLib != NULL)  { 
-        ProcTest = (genericptr_t) GetProcAddress(hinstLib, "Process32Next"); 
-        if (!ProcTest) {
-		fFreeResult = FreeLibrary(hinstLib);
-		return FALSE;
-        }
-        fFreeResult = FreeLibrary(hinstLib); 
-    } 
-     
-    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0); 
-    if (hProcessSnap == INVALID_HANDLE_VALUE) 
-        return FALSE; 
- 
-    /*  Set size of the processentry32 structure before using it. */
-    pe32.dwSize = sizeof(PROCESSENTRY32); 
-    if (Process32First(hProcessSnap, &pe32)) { 
-        do {
-            if (pe32.th32ProcessID == (unsigned)pid && pe32.szExeFile &&
-	       ((strlen(pe32.szExeFile) >= 12 &&
-		 !strcmpi(&pe32.szExeFile[strlen(pe32.szExeFile) - 12], "nethackw.exe")) ||
-		(strlen(pe32.szExeFile) >= 11 &&
-        	 !strcmpi(&pe32.szExeFile[strlen(pe32.szExeFile) - 11], "nethack.exe"))))
-	    bRet = TRUE;
-        }
-        while (Process32Next(hProcessSnap, &pe32)); 
-    } 
-    else 
-        bRet = FALSE;
-    CloseHandle(hProcessSnap); 
-    return bRet; 
-}
-#endif /* WIN_CE*/
 #endif /* WIN32 */
 
 /*winnt.c*/