[libgtop] Always define LIBGTOP_ENABLE_DEBUG (0|1) to be used in if() statements.

[Benoît Dejean <bdejean src gnome org>]

commit fd29dae93328503eb8ae89aa30152b8101823131
Author: Benoit Dejean <bdejean gmail com>
Date:   Sun Jun 21 21:43:43 2015 +0200

    Always define LIBGTOP_ENABLE_DEBUG (0|1) to be used in if() statements.

 configure.ac |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 2e78e67..a675cf8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -263,7 +263,8 @@ dnl Debugging
 AC_ARG_ENABLE(debug,
               AS_HELP_STRING([--enable-debug],
                              [Turn on debugging @<:@default=no@:>@]),
-              AC_DEFINE(LIBGTOP_ENABLE_DEBUG, 1, [Define to enable debugging]))
+              AC_DEFINE(LIBGTOP_ENABLE_DEBUG, 1, [Define to enable debugging]),
+              AC_DEFINE(LIBGTOP_ENABLE_DEBUG, 0, [Define to disable debugging]))
 AC_ARG_ENABLE(fatal-warnings,
               AS_HELP_STRING([--enable-fatal-warnings],
                              [Make all warnings fatal @<:@debug=no@:>@]),