[gegl] configure.ac: Print reason for umfpack failure

[Martin Nordholts <martinn src gnome org>]

commit d48269d455f11a31927b6ea46f3a62aa6f1531f7
Author: Martin Nordholts <martinn src gnome org>
Date:   Fri Oct 1 08:41:51 2010 +0200

    configure.ac: Print reason for umfpack failure
    
    It is have_umfpack that is printed in the end, not umfpack_ok.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 44159da..6f4da7d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -978,7 +978,7 @@ if test "x$with_umfpack" != "xno"; then
   ])
 
   if test "x$have_umfpack" != "xyes"; then
-    umfpack_ok="no  (usable umfpack library not found)"
+    have_umfpack="no  (usable umfpack library not found)"
   fi
 fi