[gegl] Don't discard ACLOCAL_FLAGS from environment

[Michael Schumacher <schumaml src gnome org>]

commit cad27b15b27619b6a45c4776b98c6f62208665cf
Author: Michael Schumacher <schumaml gmx de>
Date:   Tue Nov 23 22:57:19 2010 +0100

    Don't discard ACLOCAL_FLAGS from environment

 autogen.sh |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index a45ae8d..b2733a6 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -21,7 +21,7 @@ GLIB_REQUIRED_VERSION=2.8.0
 INTLTOOL_REQUIRED_VERSION=0.31
 LIBTOOL_REQUIRED_VERSION=1.5
 
-ACLOCAL_FLAGS="-I m4"
+ACLOCAL_FLAGS="-I ./m4 ${ACLOCAL_FLAGS}"
 
 PROJECT="GEGL"
 TEST_TYPE=-f