[folks] Correctly spell ERROR_VALAFLAGS.

[Travis Reitter <treitter src gnome org>]

commit 38dda59b515d676ec800c13f3dfa95099fd0a8a2
Author: Travis Reitter <travis reitter collabora co uk>
Date:   Fri Aug 26 08:00:32 2011 -0700

    Correctly spell ERROR_VALAFLAGS.

 backends/tracker/lib/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/backends/tracker/lib/Makefile.am b/backends/tracker/lib/Makefile.am
index 99f82bd..acb2959 100644
--- a/backends/tracker/lib/Makefile.am
+++ b/backends/tracker/lib/Makefile.am
@@ -36,7 +36,7 @@ libfolks_tracker_la_SOURCES = \
 	$(NULL)
 
 libfolks_tracker_la_VALAFLAGS = \
-	$(VALAFLAGS) \
+	$(ERROR_VALAFLAGS) \
 	--vapidir=. \
 	--vapidir=$(top_srcdir)/folks \
 	--pkg folks \