[glib] gtype: guard uses of new fundamental type check

[Ryan Lortie <desrt src gnome org>]

commit d558e87c65517e3646f3b8ebc8f11448e25ccbf2
Author: Ryan Lortie <desrt desrt ca>
Date:   Fri Jun 6 10:45:51 2014 -0400

    gtype: guard uses of new fundamental type check
    
    g_type_is_fundamentally_a (see bug 730984) is a new API/ABI and is
    marked with a version macro.  We should therefore avoid its
    unconditional use from G_IS_OBJECT() and G_IS_PARAM_SPEC() which are
    APIs that have been around for a long time.
    
    This prevents deprecation warnings from being emitted when these
    functions are used with an older GLIB_VERSION_MAX_ALLOWED and also
    prevents linking to the new ABI in that case (so that it's possible to
    use the resulting binary with an older version of GLib).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=731335

 gobject/gobject.h |    4 ++++
 gobject/gparam.h  |    4 ++++
 2 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/gobject/gobject.h b/gobject/gobject.h
index a2f9af3..522011f 100644
--- a/gobject/gobject.h
+++ b/gobject/gobject.h
@@ -62,7 +62,11 @@ G_BEGIN_DECLS
  * 
  * Checks whether a valid #GTypeInstance pointer is of type %G_TYPE_OBJECT.
  */
+#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_42
 #define G_IS_OBJECT(object)         (G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE ((object), G_TYPE_OBJECT))
+#else
+#define G_IS_OBJECT(object)         (G_TYPE_CHECK_INSTANCE_TYPE ((object), G_TYPE_OBJECT))
+#endif
 /**
  * G_IS_OBJECT_CLASS:
  * @class: a #GObjectClass
diff --git a/gobject/gparam.h b/gobject/gparam.h
index 8f216e4..7f77ca8 100644
--- a/gobject/gparam.h
+++ b/gobject/gparam.h
@@ -50,7 +50,11 @@ G_BEGIN_DECLS
  * Checks whether @pspec "is a" valid #GParamSpec structure of type %G_TYPE_PARAM
  * or derived.
  */
+#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_42
 #define G_IS_PARAM_SPEC(pspec)         (G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE ((pspec), G_TYPE_PARAM))
+#else
+#define G_IS_PARAM_SPEC(pspec)         (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), G_TYPE_PARAM))
+#endif
 /**
  * G_PARAM_SPEC_CLASS:
  * @pclass: a valid #GParamSpecClass