Log Message:
-make this build if gnome libs are installed
-being here, update to 0.18.0
 changes:
* Fixed the RGB 565 MSB -> MSB case in gdk-pixbuf-drawable - #79190
* Fixed alignment issues in the BMP loader - #84083 (Federico).
* Merged pixops.c from GTK+ HEAD as of 2002/Jun/18 (Federico).