[aisleriot] Add configure check for guile-tools

[Christian Persch <chpe src gnome org>]

commit 5d92b30efae573f03f5a63eeeaf3966880da45f7
Author: Christian Persch <chpe gnome org>
Date:   Thu Apr 14 18:53:20 2011 +0200

    Add configure check for guile-tools

 configure.ac |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c25a1e0..1665a5a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -540,6 +540,11 @@ PKG_CHECK_EXISTS([$GUILE_PKGS],
 
 PKG_CHECK_MODULES([GUILE],[$GUILE_PKGS])
 
+AC_PATH_PROG([GUILE_TOOLS],[guile-tools],[false])
+if test "$GUILE_TOOLS" = "false"; then
+  AC_MSG_ERROR([guile-tools not found])
+fi
+
 # *************
 # Documentation
 # *************