gst: Move PyGstMiniObject to public API.

Allows it to be reused from 3rd party modules.

https://bugzilla.gnome.org/show_bug.cgi?id=656289

gst/pygst.h

@@ -25,6 +25,8 @@
 
 #include <glib.h>
 #include <glib-object.h>
+#include <gst/gst.h>
+
 #include "common.h"
 
 G_BEGIN_DECLS
@@ -35,6 +37,16 @@ struct _PyGst_Functions {
   PyObject*     (*miniobject_new) (GstMiniObject *obj);
 };
 
+#define pygstminiobject_get(v) (((PyGstMiniObject *)(v))->obj)
+#define pygstminiobject_check(v,base) (PyObject_TypeCheck(v,base))
+
+typedef struct {
+    PyObject_HEAD
+    GstMiniObject *obj;
+    PyObject *inst_dict; /* the instance dictionary -- must be last */
+    PyObject *weakreflist; /* list of weak references */
+} PyGstMiniObject;
+
 #ifndef _INSIDE_PYGST_
 
 #if defined(NO_IMPORT_PYGOBJECT)

gst/pygstminiobject.c

@@ -21,7 +21,9 @@
  */
 
 #define NO_IMPORT_PYGOBJECT
+#define _INSIDE_PYGST_
 #include "pygstminiobject.h"
+#include "pygst.h"
 #include <gst/gst.h>
 
 static const gchar pygstminiobject_class_id[] = "PyGstMiniObject::class";

gst/pygstminiobject.h

@@ -20,15 +20,6 @@ G_BEGIN_DECLS
 #define PYGIL_API_IS_BUGGY FALSE
 #endif
 
-typedef struct {
-    PyObject_HEAD
-    GstMiniObject *obj;
-    PyObject *inst_dict; /* the instance dictionary -- must be last */
-    PyObject *weakreflist; /* list of weak references */
-} PyGstMiniObject;
-
-#define pygstminiobject_get(v) (((PyGstMiniObject *)(v))->obj)
-#define pygstminiobject_check(v,base) (PyObject_TypeCheck(v,base))
 
 void
 pygstminiobject_register_class(PyObject *dict, const gchar *type_name,