[folks] build: Require valac if libfolks-internal files are missing.

[Travis Reitter <treitter src gnome org>]

commit c37db39e9f97774865ce263bfb8f31fd04700e20
Author: Travis Reitter <travis reitter collabora co uk>
Date:   Mon Oct 17 16:35:51 2011 -0700

    build: Require valac if libfolks-internal files are missing.

 configure.ac |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a51f2d9..18b4481 100644
--- a/configure.ac
+++ b/configure.ac
@@ -214,6 +214,9 @@ if test \
         ! -e ${sd}backends/telepathy/lib/tp-lowlevel.gir -o \
         ! -e ${sd}backends/telepathy/lib/tp-lowlevel.vapi -o \
         ! -e ${sd}backends/telepathy/lib/libfolks_telepathy_la_vala.stamp -o \
+        ! -e ${sd}folks/folks-internal.h -o \
+        ! -e ${sd}folks/folks-internal.vapi -o \
+        ! -e ${sd}folks/libfolks_internal_la_vala.stamp -o \
         ! -e ${sd}folks/folks.vapi -o \
         ! -e ${sd}folks/libfolks_la_vala.stamp ; then
         enable_vala=yes