Quieten without-x, without-xml2 builds

* lisp/help.el (x-display-pixel-height, x-display-pixel-width):
* lisp/image.el (image-flush, image-size):
* lisp/textmodes/sgml-mode.el (libxml-parse-html-region):
Declare for compiler.

1 files changed, 3 insertions, 0 deletions

diff --git a/lisp/textmodes/sgml-mode.el b/lisp/textmodes/sgml-mode.el
index eb6ebf52807..f6bdfc63844 100644
--- a/lisp/textmodes/sgml-mode.el
+++ b/lisp/textmodes/sgml-mode.el
@@ -2232,6 +2232,9 @@ buffer's tick counter (as produced by `buffer-modified-tick'),
 and the CDR is the list of class names found in the buffer.")
 (make-variable-buffer-local 'html--buffer-ids-cache)
 
+(declare-function libxml-parse-html-region "xml.c"
+                  (start end &optional base-url discard-comments))
+
 (defun html-current-buffer-classes ()
   "Return a list of class names used in the current buffer.
 The result is cached in `html--buffer-classes-cache'."