[gtk-doc] gtk-doc.m4: Don't fail if glib is not available.

[Stefan Kost <stefkost src gnome org>]

commit 511b87d308b7069d6cb9f4dc868cca2314f16e37
Author: Simon Josefsson <simon josefsson org>
Date:   Thu Dec 1 20:51:26 2011 +0100

    gtk-doc.m4: Don't fail if glib is not available.

 gtk-doc.m4 |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk-doc.m4 b/gtk-doc.m4
index 604f75c..ac2eccb 100644
--- a/gtk-doc.m4
+++ b/gtk-doc.m4
@@ -37,7 +37,7 @@ AC_DEFUN([GTK_DOC_CHECK],
     dnl don't check for glib if we build glib
     if test "x$PACKAGE_NAME" != "xglib"; then
       dnl don't fail if someone does not have glib
-      PKG_CHECK_MODULES(GTKDOC_DEPS, glib-2.0 >= 2.10.0 gobject-2.0  >= 2.10.0,,)
+      PKG_CHECK_MODULES(GTKDOC_DEPS, glib-2.0 >= 2.10.0 gobject-2.0  >= 2.10.0,,[:])
     fi
   fi