* image.el (image-type-from-buffer): Only return supported image type.

Fixes: debbugs:9045

2 files changed, 6 insertions, 1 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index a709c017416..ad6fd35bc5d 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,5 +1,8 @@
 2012-04-26  Chong Yidong  <cyd@gnu.org>
 
+        * image.el (image-type-from-buffer): Only return supported image
+        type (Bug#9045).
+
         * vc/diff-mode.el (diff-beginning-of-hunk): Return a meaningful
         value, for symmetry with diff-end-of-hunk.
         (diff-split-hunk, diff-find-source-location)
diff --git a/lisp/image.el b/lisp/image.el
index 348c208781e..27e41a57efe 100644
--- a/lisp/image.el
+++ b/lisp/image.el
@@ -282,7 +282,9 @@ be determined."
                   types nil)
           (setq types (cdr types)))))
     (goto-char opoint)
-    type))
+    (and type
+         (memq type image-types)
+         type)))
 
 
 ;;;###autoload