[gobject-introspection] introspection.m4: Set enable_introspection to yes/no consistently

[Colin Walters <walters src gnome org>]

commit 104312fc07e7308c5ef4f393560639cc0efd372d
Author: Colin Walters <walters verbum org>
Date:   Thu Feb 23 11:13:29 2012 -0500

    introspection.m4: Set enable_introspection to yes/no consistently
    
    Some people want the ability to use it inside their configure scripts.
    
    http://git.gnome.org/browse/totem/commit/?id=e57d75f555eaad98ec3eee31cf94336ba885174c

 m4/introspection.m4 |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/m4/introspection.m4 b/m4/introspection.m4
index 589721c..d89c3d9 100644
--- a/m4/introspection.m4
+++ b/m4/introspection.m4
@@ -41,6 +41,8 @@ m4_define([_GOBJECT_INTROSPECTION_CHECK_INTERNAL],
     ],dnl
     [auto],[dnl
         PKG_CHECK_EXISTS([gobject-introspection-1.0 >= $1], found_introspection=yes, found_introspection=no)
+	dnl Canonicalize enable_introspection
+	enable_introspection=$found_introspection
     ],dnl
     [dnl	
         AC_MSG_ERROR([invalid argument passed to --enable-introspection, should be one of @<:@no/auto/yes@:>@])