Borland build fixes (from Yitzhak)

> This patch fixes warnings relating to pointers (using int *
> instead of unsigned int * ), provides prototypes for some
> functions, and adds a missing argument to one of the functions
>
> It also changes a bit in the way flex/bison are used in the
> Borland makefile to allow me to test compilation with those
> utilities using a batch file.

sys/winnt/nhraykey.c

@@ -4,6 +4,7 @@
 
 /*
  * Keystroke handling contributed by Ray Chason.
+ * The following text was written by Ray Chason.
  *  
  * The problem
  * ===========
@@ -153,6 +154,7 @@
  *     * After pushing the bogus key and calling ReadConsole, check to see
  *       if we got the bogus key; if so, and an Alt is pressed, process the
  *       event as an Alt sequence.
+ * 
  */
 
 static char where_to_get_source[] = "http://www.nethack.org/";
@@ -167,6 +169,10 @@ extern INPUT_RECORD ir;
 char dllname[512];
 char *shortdllname;
 
+int FDECL(__declspec(dllexport) __stdcall
+ProcessKeystroke, (HANDLE hConIn, INPUT_RECORD *ir, 
+    boolean *valid, BOOLEAN_P numberpad, int portdebug));
+
 static INPUT_RECORD bogus_key;
 
 int WINAPI DllMain(HINSTANCE hInstance, DWORD fdwReason, PVOID pvReserved)
@@ -444,7 +450,8 @@ int __declspec(dllexport) __stdcall
 CheckInput(hConIn, ir, count, numpad, mode, mod, cc)
 HANDLE hConIn;
 INPUT_RECORD *ir;
-int *count, *mod;
+DWORD *count;
+int *mod;
 boolean numpad;
 coord *cc;
 {