[gtk+] build: Fix out-of-tree build of widget-factory demo application

[Ryan Lortie <ryanl src gnome org>]

commit 7c038b1b33a393d5075fe6e4767d622c9bcfd7fc
Author: Michael Biebl <biebl debian org>
Date:   Mon Apr 16 13:40:07 2012 +0200

    build: Fix out-of-tree build of widget-factory demo application
    
    https://bugzilla.gnome.org/show_bug.cgi?id=674192

 demos/widget-factory/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/demos/widget-factory/Makefile.am b/demos/widget-factory/Makefile.am
index 39b5231..8989139 100644
--- a/demos/widget-factory/Makefile.am
+++ b/demos/widget-factory/Makefile.am
@@ -22,7 +22,7 @@ gtk3_widget_factory_LDADD = \
 	$(top_builddir)/gtk/libgtk-3.la \
 	$(GTK_DEP_LIBS)
 
-widget_factory_resources.c: widget-factory.gresource.xml $(shell $(GLIB_COMPILE_RESOURCES) --generate-dependencies $(srcdir)/widget-factory.gresource.xml)
+widget_factory_resources.c: widget-factory.gresource.xml $(shell $(GLIB_COMPILE_RESOURCES) --sourcedir=$(srcdir) --generate-dependencies $(srcdir)/widget-factory.gresource.xml)
 	$(AM_V_GEN) $(GLIB_COMPILE_RESOURCES) --target=$@ --sourcedir=$(srcdir) --generate-source $<
 
 EXTRA_DIST += \