Add an optional testfn parameter to assoc

* src/fns.c (assoc): New optional testfn parameter used for comparison
when provided.
* test/src/fns-tests.el (test-assoc-testfn): Add tests for the new
'testfn' parameter.
* src/buffer.c:
* src/coding.c:
* src/dbusbind.c:
* src/font.c:
* src/fontset.c:
* src/gfilenotify.c:
* src/image.c:
* src/keymap.c:
* src/process.c:
* src/w32fns.c:
* src/w32font.c:
* src/w32notify.c:
* src/w32term.c:
* src/xdisp.c:
* src/xfont.c: Add a third argument to Fassoc calls.
* etc/NEWS:
* doc/lispref/lists.texi: Document the new 'testfn' parameter.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/font.c b/src/font.c
index 5a3f271ef85..a5e5b6a5b9d 100644
--- a/src/font.c
+++ b/src/font.c
@@ -1893,7 +1893,7 @@ otf_tag_symbol (OTF_Tag tag)
 static OTF *
 otf_open (Lisp_Object file)
 {
-  Lisp_Object val = Fassoc (file, otf_list);
+  Lisp_Object val = Fassoc (file, otf_list, Qnil);
   OTF *otf;
 
   if (! NILP (val))