Can't make IME on after \"

[Masakazu Takahashi]

## bug description

When I type:

    abc \"def

and make IME on, ibus-el-agent prints excaption:

    eval: Traceback (most recent call last):
      File "/usr/lib/ibus-el/ibus-el-agent", line 555, in __stdin_cb
        exec sys.stdin.readline()
      File "<string>", line 1
        set_surrounding_text(1, "abc \"def", 9, 9)
                                      ^
    SyntaxError: invalid syntax

and IME doesn't made to be on.

## cause of error

In ibus.el, set_surrounding_text() is sent like:

    (ibus-agent-send "set_surrounding_text(%d, \"%s\", %d, %d)"
                     ibus-imcontext-id
                     (ibus-escape-string (car surrounding-text))
    ...

but backslashes doesn't seems tobe escaped by ibus-escape-string.

## patch

$ diff -u /usr/share/emacs/site-lisp/ibus/ibus.el ./ibus.el
--- /usr/share/emacs/site-lisp/ibus/ibus.el 2013-02-08 08:11:58.000000000 +0900
+++ ./ibus.el 2013-09-21 16:13:58.184039165 +0900
@@ -2493,14 +2493,14 @@
   (let* ((tmp (append str nil))
          cur
          (next tmp))
- (while (setq cur (memq ?\" next))
- (setq next (cdr cur))
- (setcar cur ?\\)
- (setcdr cur (cons ?\" next)))
     (while (setq cur (memq ?\\ next))
       (setq next (cdr cur))
       (setcdr cur (cons ?\\ next)))
     (setq next tmp)
+ (while (setq cur (memq ?\" next))
+ (setq next (cdr cur))
+ (setcar cur ?\\)
+ (setcdr cur (cons ?\" next)))
     (concat tmp)))

 (defun ibus-set-surrounding-text ()