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.
Added tag v7-4a-027 for changeset 8edba3805d78
updated for version 7.4a.028
Problem:    Crash when spell checking in new buffer.
Solution:   Set the b_p_key field.  (Mike Williams)
Added tag v7-4a-028 for changeset 7aca84c0cd37