Allow shr to use data: URLs without encoding

* lisp/net/shr.el (shr-image-from-data): Don't bug out on
image data: URLs that have no base64 encoding like
(shr-image-from-data
"text/html,%3Ch1%3EHello%2C%20World!%3C%2Fh1%3E").

1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/net/shr.el b/lisp/net/shr.el
index ab7240c8c3d..ad5d869531c 100644
--- a/lisp/net/shr.el
+++ b/lisp/net/shr.el
@@ -994,7 +994,8 @@ If EXTERNAL, browse the URL using `shr-external-browser'."
          data)
     (let ((param (match-string 4 data))
           (payload (url-unhex-string (match-string 5 data))))
-      (when (string-match "^.*\\(;[ \t]*base64\\)$" param)
+      (when (and param
+                 (string-match "^.*\\(;[ \t]*base64\\)$" param))
         (setq payload (ignore-errors
                         (base64-decode-string payload))))
       payload)))