Bustage fix #2 for bug 402742.

toolkit/library/libxul-config.mk

@@ -276,6 +276,11 @@ DEFINES += -DMOZ_ENABLE_POSTSCRIPT
 STATIC_LIBS += gfxpsshar
 endif
 
+ifneq (,$(filter icon,$(MOZ_IMG_DECODERS)))
+DEFINES += -DICON_DECODER
+COMPONENT_LIBS += imgicon
+endif
+
 ifdef MOZ_ENABLE_CAIRO_GFX
 STATIC_LIBS += thebes
 COMPONENT_LIBS += gkgfxthebes