Revert "curses port: accept return on Windows platform"

This reverts commit ac367ef4cc.

win/curses/cursmesg.c

@@ -132,11 +132,6 @@ curses_message_win_puts(const char *message, boolean recursed)
     wrefresh(win);
 }
 
-#ifdef WIN32
-#define XTRA_RESP "\r"
-#else
-#define XTRA_RESP ""
-#endif
 
 int
 curses_block(boolean noscroll)
@@ -145,7 +140,8 @@ curses_block(boolean noscroll)
 {
     int height, width, ret;
     WINDOW *win = curses_get_nhwin(MESSAGE_WIN);
-    char *resp = " \n\033" XTRA_RESP; /* space, enter, esc */
+    char *resp = " \n\033"; /* space, enter, esc */
+
 
     curses_get_window_size(MESSAGE_WIN, &height, &width);
     curses_toggle_color_attr(win, MORECOLOR, NONE, ON);