$OpenBSD$
Unbreak build.
--- src/core/qipblackandwhiteimage.h.orig	Thu Jul 30 15:29:00 2015
+++ src/core/qipblackandwhiteimage.h	Thu Jul 30 15:28:38 2015
@@ -57,12 +57,12 @@ class QIPBlackAndWhiteImage
 (public)
      *  Returns the image's width.
      * \sa height
     */
-    quint32 width();
+    quint32 width() const;
     /*!
      *  Returns the image's height.
      * \sa width
     */
-    quint32 height();
+    quint32 height() const;
 
 
     /*!
