[goocanvasmm] Fix the build with the latest gtkmm from git master.

[Murray Cumming <murrayc src gnome org>]

commit 66a870ea38a8007c887c60273e484553aa3de757
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Dec 16 09:56:38 2010 +0100

    Fix the build with the latest gtkmm from git master.
    
    * configure.ac: Set GMMPROC_EXTRA_M4_DIR to use the gtkmm m4 conversions.

 ChangeLog    |    6 ++++++
 configure.ac |    1 +
 2 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 90f08d1..ee6b5e9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2010-12-16  Murray Cumming  <murrayc murrayc com>
+
+	Fix the build with the latest gtkmm from git master.
+
+	* configure.ac: Set GMMPROC_EXTRA_M4_DIR to use the gtkmm m4 conversions.
+
 2010-12-03  Murray Cumming  <murrayc murrayc com>
 
 	Fix the build with the latest gtkmm from git master.
diff --git a/configure.ac b/configure.ac
index 0520a8d..e469619 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,6 +43,7 @@ PKG_CHECK_MODULES([GOOCANVASMM], [$GOOCANVASMM_MODULES])
 
 MM_PKG_CONFIG_SUBST([GTHREAD_CFLAGS], [--cflags-only-other gthread-2.0])
 MM_PKG_CONFIG_SUBST([GMMPROC_DIR], [--variable=gmmprocdir glibmm-2.4])
+MM_PKG_CONFIG_SUBST([GMMPROC_EXTRA_M4_DIR], [--variable=gmmprocm4dir gtkmm-3.0])
 
 MM_ARG_ENABLE_DOCUMENTATION
 MM_ARG_WITH_TAGFILE_DOC([libstdc++.tag], [mm-common-libstdc++])