[tomboy] Check for "mono-nunit" package, not "nunit".

[Sanford Armstrong <sharm src gnome org>]

commit 8bd6d33f7f904f0208471da814a9c770bbeddc0a
Author: Sandy Armstrong <sanfordarmstrong gmail com>
Date:   Sun May 17 07:42:50 2009 -0700

    Check for "mono-nunit" package, not "nunit".
---
 configure.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/configure.in b/configure.in
index 2c45abb..b2dbb53 100644
--- a/configure.in
+++ b/configure.in
@@ -255,7 +255,7 @@ AC_SUBST(GALAGO_LIBS)
 #
 # NUnit required for (optional) unit tests
 #
-PKG_CHECK_MODULES(NUNIT, nunit, HAVE_NUNIT="yes", HAVE_NUNIT="no")
+PKG_CHECK_MODULES(NUNIT, mono-nunit, HAVE_NUNIT="yes", HAVE_NUNIT="no")
 AM_CONDITIONAL(HAVE_NUNIT, test "$HAVE_NUNIT" = "yes")
 AC_SUBST(NUNIT_LIBS)
 AC_PATH_PROG(NUNIT, nunit-console)