[w3m-dev 03732] Re: scroll() is slow ?

* configure (use_raw_scroll): added
	(config.h) use_raw_scroll
* config.h.dist (USE_RAW_SCROLL): added
* display.c (displayBuffer): ifdef USE_RAW_SCROLL
* proto.h (scroll): ifdef USE_RAW_SCROLL
	(rscroll): ditto
	(need_clrtoeol): if 0
	(terms.c): if 0 need_clrtoeol
	(scroll_raw): ifdef USE_RAW_SCROLL
From: Hironori SAKAMOTO <hsaka@mth.biglobe.ne.jp>

terms.c

@@ -1,4 +1,4 @@
-/* $Id: terms.c,v 1.43 2003/01/10 16:16:45 ukai Exp $ */
+/* $Id: terms.c,v 1.44 2003/02/06 17:15:16 ukai Exp $ */
 /* 
  * An original curses library for EUC-kanji by Akinori ITO,     December 1989
  * revised by Akinori ITO, January 1995
@@ -398,7 +398,10 @@ void clear(), wrap(), touch_line(), touch_column(int);
 void switch_wchar(FILE *);
 void switch_ascii(FILE *);
 #endif
-void need_clrtoeol(void), clrtoeol(void);	/* conflicts with curs_clear(3)? */
+#if 0
+void need_clrtoeol(void);
+#endif
+void clrtoeol(void);	/* conflicts with curs_clear(3)? */
 
 int write1(char);
 
@@ -1444,6 +1447,7 @@ clear(void)
     CurrentMode = C_ASCII;
 }
 
+#ifdef USE_RAW_SCROLL
 static void
 scroll_raw(void)
 {				/* raw scroll */
@@ -1535,6 +1539,7 @@ rscroll(int n)
 	}
     }
 }
+#endif
 
 #if 0
 void