[glib] Use 'if test' for checking auto* variables' values

[Rodrigo Moya <rodrigo src gnome org>]

commit 9aa19e1d9615924ab25c63918d09d334a0277b8e
Author: Rodrigo Moya <rodrigo gnome-db org>
Date:   Wed Apr 4 11:55:40 2012 +0200

    Use 'if test' for checking auto* variables' values

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index cbd868d..cf24f39 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3350,7 +3350,7 @@ g_pollnval=$glib_cv_value_POLLNVAL
 # This is needed because glib-mkenums doesn't handle optional
 # values in enums, and thus we have to have all existing values
 # defined in the enum.
-if "x$glib_cv_value_AF_UNIX" != "x"; then
+if test "x$glib_cv_value_AF_UNIX" != "x"; then
   g_af_unix=$glib_cv_value_AF_UNIX
 else
   g_af_unix=-1