work around slang brain damage in total_update()

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2724 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -315,6 +315,9 @@ CVS code -
   total_update()
 	- Simplify to call clearok(TRUE) and wrefresh() on edit, which
 	  updates the entire screen in fewer function calls. (DLR)
+	- When using slang, use SLsmg_touch_screen() and SLsmg_refresh()
+	  to update the screen, as the curses method will leave some
+	  windows cleared without properly updating them. (DLR)
   do_replace_highlight()
 	- Use waddch() instead of waddstr() to display a space when we
 	  have a zero-length regex. (DLR)

src/winio.c

@@ -3707,8 +3707,16 @@ int do_yesno(bool all, const char *msg)
 
 void total_update(void)
 {
+#ifdef USE_SLANG
+    /* Slang curses emulation brain damage, part 3: If we just do what
+     * curses does here, it'll leave some windows cleared without
+     * updating them properly. */
+    SLsmg_touch_screen();
+    SLsmg_refresh();
+#else
     clearok(edit, TRUE);
     wrefresh(edit);
+#endif
 }
 
 void total_refresh(void)