PATCH: fix vi-goto-mark to allow jumps to the last mark

[David Bitseff <bitsed@gmail.com>]

I've noticed that the vi-goto-mark zle widget doesn't work as expected on my 
system.  If I try jumping to a mark that I just set using the vi-set-mark 
widget there is no movement of the cursor.  To replicate the problem:

1) use vi-up-line-or-history to recall a suitably long command
2) use vi-forward-char a few times to move the cursor a bit
3) set a mark using vi-set-mark
4) use vi-forward-char a few times to move the cursor some more
5) try jumping to the mark just created using vi-goto-mark
6) notice no cursor movement

The patch below appears to solve the problem.

diff --git a/Src/Zle/zle_move.c b/Src/Zle/zle_move.c
index f15b114..32ed76d 100644
--- a/Src/Zle/zle_move.c
+++ b/Src/Zle/zle_move.c
@@ -807,7 +807,7 @@ vigotomark(UNUSED(char **args))
 
     ch = getfullchar(0);
     if (ch == lfc)
-   ch = 26;
+   ch -= ZWC('a');
     else {
    if (ch < ZWC('a') || ch > ZWC('z'))
        return 1;