Added .inc files as php-mode as well.

Author: arnested

drupal-mode.el

@@ -671,7 +671,7 @@ mode-hook."
 
 ;;;###autoload
 (progn
-  (add-to-list 'auto-mode-alist '("[^/]\\.\\(module\\|test\\|install\\|profile\\|tpl\\.php\\|theme\\)\\'" . php-mode))
+  (add-to-list 'auto-mode-alist '("[^/]\\.\\(module\\|test\\|install\\|profile\\|tpl\\.php\\|theme\\|inc\\)\\'" . php-mode))
   (add-to-list 'auto-mode-alist '("[^/]\\.info\\'" . conf-windows-mode)))