[libgames-support] configure.ac: quote more things

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 12cbe321d83035ee5b1a4fa6b76d5e91e86785a6
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sat Jun 27 19:50:20 2015 -0500

    configure.ac: quote more things

 configure.ac |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4d06b38..ba5410b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,7 +12,7 @@ dnl   release, then set age to 0)
 dnl
 dnl http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
 LIBGAMES_SUPPORT_LT_VERSION=0:0:0
-AC_SUBST(LIBGAMES_SUPPORT_LT_VERSION)
+AC_SUBST([LIBGAMES_SUPPORT_LT_VERSION])
 
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
@@ -27,7 +27,7 @@ AM_PROG_VALAC([0.24])
 LT_PREREQ([2.2])
 LT_INIT([disable-static])
 
-PKG_CHECK_MODULES(LIBGAMES_SUPPORT, [
+PKG_CHECK_MODULES([LIBGAMES_SUPPORT], [
   glib-2.0 >= 2.40
   gio-2.0 >= 2.40
   gtk+-3.0 >= 3.12
@@ -35,8 +35,8 @@ PKG_CHECK_MODULES(LIBGAMES_SUPPORT, [
 ])
 
 GETTEXT_PACKAGE=AC_PACKAGE_NAME
-AC_SUBST(GETTEXT_PACKAGE)
-IT_PROG_INTLTOOL(0.50.2)
+AC_SUBST([GETTEXT_PACKAGE])
+IT_PROG_INTLTOOL([0.50.2])
 
 AC_CONFIG_FILES([
        Makefile