Subject: Documentation bug.

From: Fis Trivial <[email-masked]>
Date: Sun, 25 Mar 2018 21:30:42 +0000

On the subject: Defining Foreign Object Types
at
https://www.gnu.org/software/guile/manual/html_node/Defining-Foreign-Object-Types.html#Defining-Foreign-Object-Types

There is a example code snippet written in c. In the middle of that
snippet:

#+BEGIN_SRC c

static SCM image_type image_type;

#+END_SRC

I think the declaration is wrong, there should be only one
`image_type`. :).