[elpa] externals/osm 7657cb1b3b 71/77: Add check for image format support

[ELPA Syncer]

branch: externals/osm
commit 7657cb1b3b3c339a538ba803536db4fc385bc19e
Author: Daniel Mendler <mail@daniel-mendler.de>
Commit: Daniel Mendler <mail@daniel-mendler.de>

    Add check for image format support
---
 osm.el | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/osm.el b/osm.el
index 411e056ce6..baf26a1598 100644
--- a/osm.el
+++ b/osm.el
@@ -490,6 +490,9 @@ Should be at least 7 days according to the server usage 
policies."
 (define-derived-mode osm-mode special-mode "Osm"
   "OpenStreetMap viewer mode."
   :interactive nil
+  (dolist (type '(svg jpeg png))
+    (unless (image-type-available-p type)
+      (warn "osm: Support for %s images is missing" type)))
   (osm--clean-cache)
   (setq-local osm-server osm-server
               line-spacing nil