Pedantry patch from RDB: sanitise header use, correct one comment

and remove an unused variable.

[originally from svn r1243]

mscrypto.c

@@ -1,3 +1,4 @@
+#error "This file is no longer part of PuTTY, it will not compile."
 #define _WIN32_WINNT 0x0400
 #include <windows.h>
 #include <stdio.h>

scp.c

@@ -22,9 +22,6 @@
 #include <limits.h>
 #include <time.h>
 #include <assert.h>
-/* GUI Adaptation - Sept 2000 */
-#include <winuser.h>
-#include <winbase.h>
 
 #define PUTTY_DO_GLOBALS
 #include "putty.h"

sizetip.c

@@ -1,8 +1,7 @@
 #include <windows.h>
-#include <winreg.h>
-#include <tchar.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <tchar.h>
 
 #include "putty.h"
 #include "winstuff.h"

sshzlib.c

@@ -40,13 +40,13 @@
 #include <stdlib.h>
 #include <assert.h>
 
-/* FIXME */
-#include <windows.h>
-#include <stdio.h>
-#include "putty.h"
-
 #include "ssh.h"
 
+#ifndef FALSE
+#define FALSE 0
+#define TRUE (!FALSE)
+#endif
+
 /* ----------------------------------------------------------------------
  * Basic LZ77 code. This bit is designed modularly, so it could be
  * ripped out and used in a different LZ77 compressor. Go to it,

unicode.c

@@ -16,7 +16,7 @@ static void get_unitab(int codepage, wchar_t * unitab, int ftype);
 
 /* Character conversion arrays; they are usually taken from windows,
  * the xterm one has the four scanlines that have no unicode 2.0
- * equlivents mapped into the private area.
+ * equivalents mapped to their unicode 3.0 locations.
  */
 static char **uni_tbl;
 
@@ -267,7 +267,7 @@ void init_ucs_tables(void)
     int i, j;
     int used_dtf = 0;
     char tbuf[256];
-    int old_codepage = line_codepage;
+
     for (i = 0; i < 256; i++)
 	tbuf[i] = i;