[banshee] build: make required mono-nunit version more visible

[Andrés Aragoneses <aaragoneses src gnome org>]

commit 3891ed1e5aaa7d06497525ab5bfc44110939a369
Author: Andrés G. Aragoneses <knocte gmail com>
Date:   Mon Jan 6 23:27:39 2014 +0100

    build: make required mono-nunit version more visible
    
    NOTE: this is not NUnit version but Mono's version (so if
    you require 2.4 you're requiring the nunit version that
    Mono 2.4 embeds).

 build/m4/shamrock/nunit.m4 |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/build/m4/shamrock/nunit.m4 b/build/m4/shamrock/nunit.m4
index 1b70f4f..78f3f91 100644
--- a/build/m4/shamrock/nunit.m4
+++ b/build/m4/shamrock/nunit.m4
@@ -1,6 +1,7 @@
 AC_DEFUN([SHAMROCK_CHECK_NUNIT],
 [
        NUNIT_REQUIRED=2.4.7
+       MONO_NUNIT_REQUIRED=2.4
 
        AC_ARG_ENABLE(tests, AC_HELP_STRING([--enable-tests], [Enable NUnit tests]),
                enable_tests=$enableval, enable_tests="no")
@@ -16,7 +17,7 @@ AC_DEFUN([SHAMROCK_CHECK_NUNIT],
                AM_CONDITIONAL(ENABLE_TESTS, test "x$do_tests" = "xyes")
 
                if test "x$do_tests" = "xno"; then
-                       PKG_CHECK_MODULES(NUNIT, mono-nunit >= 2.4,
+                       PKG_CHECK_MODULES(NUNIT, mono-nunit >= $MONO_NUNIT_REQUIRED,
                                do_tests="yes", do_tests="no")
 
                        AC_SUBST(NUNIT_LIBS)