updated for version 7.4a.027

Problem:    When Python adds lines to another buffer the cursor position is
            wrong, it might be below the last line causing ml_get errors.
            (Vlad Irnov)
Solution:   Temporarily change the current window, so that marks are corrected
            properly.

src/proto/buffer.pro

@@ -52,6 +52,7 @@ void do_modelines __ARGS((int flags));
 int read_viminfo_bufferlist __ARGS((vir_T *virp, int writing));
 void write_viminfo_bufferlist __ARGS((FILE *fp));
 char_u *buf_spname __ARGS((buf_T *buf));
+int find_win_for_buf __ARGS((buf_T *buf, win_T **wp, tabpage_T **tp));
 void buf_addsign __ARGS((buf_T *buf, int id, linenr_T lnum, int typenr));
 linenr_T buf_change_sign_type __ARGS((buf_T *buf, int markId, int typenr));
 int buf_getsigntype __ARGS((buf_T *buf, linenr_T lnum, int type));