[libgee] Fix missing header

[Maciej Marcin Piechotka <mpiechotka src gnome org>]

commit e10a37c8f185062d98dccfc4263986ef69a76657
Author: Maciej Piechotka <uzytkownik2 gmail com>
Date:   Tue Jul 30 01:05:58 2013 +0200

    Fix missing header

 gee/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gee/Makefile.am b/gee/Makefile.am
index dca4162..0d6a065 100644
--- a/gee/Makefile.am
+++ b/gee/Makefile.am
@@ -77,6 +77,7 @@ libgee_0_8_la_SOURCES = \
        treemultiset.vala \
        treeset.vala \
        unfolditerator.vala \
+       ../utils/async.h \
        $(NULL)
 
 libgee_0_8_la_VALAFLAGS = \