winansi: revert to previous console behaviour for vi/less

Recent changes to make the Windows console behave more like a *nix
terminal didn't work too well for vi/less.  On *nix the terminal
buffer can't be scrolled while such screen-based applications are
running.  In the Windows console this remained possible and led to
confusion.

Add a new routine to allow vi/less to revert to their previous
behaviour where the cursor is positioned at the top of the buffer
and the entire buffer is cleared.

1 files changed, 1 insertions, 0 deletions

diff --git a/include/mingw.h b/include/mingw.h
index 5faef41bf..555fa96b7 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -155,6 +155,7 @@ int mingw_pclose(FILE *fd);
  */
 
 void move_cursor_row(int n);
+void reset_screen(void);
 int winansi_putchar(int c);
 int winansi_puts(const char *s);
 size_t winansi_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);