Emacs: Fix browse-url-generic-program setting

.emacs.d/lisp/init-emms.el

@@ -138,7 +138,8 @@ will always use the same cover per folder."
     (emms-pause)))
 
 ;;; TODO: See if mpd is faster at building the db. Not so important.
-;;; TODO: Delete entry from cache? See `emms-cache-del'. Not so important.
+
+;;; TODO: Delete entry from cache? See `emms-cache-del'.
 
 ;;; TODO: Browse by album-artist? libtag has the field.
 ;; https://emacs.stackexchange.com/questions/10412/sort-by-artist-in-emms-with-compilation-albums/10435

.emacs.d/lisp/main.el

@@ -140,9 +140,7 @@
 
 ;;; Make Emacs use environment browser, or w3m if BROWSER is not set.
 (setq browse-url-generic-program
-      (executable-find
-       (let ((b (getenv "BROWSER")))
-         (if b b "w3m" )))
+      (or (executable-find (or (getenv "BROWSER") "")) (executable-find "w3m"))
       browse-url-browser-function 'browse-url-generic)
 
 ;;; Default ispell dictionary. If not set, Emacs uses the current locale.