registry: use GStatBuf unconditionally and add typedef for backwards compatibility

No need to clutter the code with #if #else #endif.

See #623875.

gst/glib-compat-private.h

@@ -10,6 +10,10 @@
 
 G_BEGIN_DECLS
 
+#if !GLIB_CHECK_VERSION(2,25,0)
+typedef struct stat GStatBuf;
+#endif
+
 /* copies */
 
 /* adaptations */

gst/gstplugin.c

@@ -670,11 +670,7 @@ gst_plugin_load_file (const gchar * filename, GError ** error)
   GModule *module;
   gboolean ret;
   gpointer ptr;
-#if GLIB_CHECK_VERSION(2,25,0)
   GStatBuf file_status;
-#else
-  struct stat file_status;
-#endif
   GstRegistry *registry;
   gboolean new_plugin = TRUE;
 
@@ -1470,13 +1466,7 @@ gst_plugin_ext_dep_extract_env_vars_paths (GstPlugin * plugin,
 }
 
 static guint
-gst_plugin_ext_dep_get_hash_from_stat_entry (
-#if GLIB_CHECK_VERSION(2,25,0)
-    GStatBuf * s
-#else
-    struct stat *s
-#endif
-    )
+gst_plugin_ext_dep_get_hash_from_stat_entry (GStatBuf * s)
 {
   if (!(s->st_mode & (S_IFDIR | S_IFREG)))
     return (guint) - 1;
@@ -1533,11 +1523,7 @@ gst_plugin_ext_dep_scan_dir_and_match_names (GstPlugin * plugin,
    * the same order, and not in a random order */
   while ((entry = g_dir_read_name (dir))) {
     gboolean have_match;
-#if GLIB_CHECK_VERSION(2,25,0)
     GStatBuf s;
-#else
-    struct stat s;
-#endif
     gchar *full_path;
     guint fhash;
 
@@ -1594,12 +1580,7 @@ gst_plugin_ext_dep_scan_path_with_filenames (GstPlugin * plugin,
    * and going through each entry to see if it matches one of our filenames. */
   if (!recurse_into_dirs && !partial_names) {
     for (i = 0; filenames[i] != NULL; ++i) {
-#if GLIB_CHECK_VERSION(2,25,0)
       GStatBuf s;
-#else
-      struct stat s;
-#endif
-
       gchar *full_path;
       guint fhash;
 

gst/gstregistry.c

@@ -135,6 +135,7 @@
 #include "gst-i18n-lib.h"
 
 #include "gst.h"
+#include "glib-compat-private.h"
 
 #ifdef G_OS_WIN32
 #include <windows.h>
@@ -1106,11 +1107,7 @@ gst_registry_scan_path_level (GstRegistryScanContext * context,
     return FALSE;
 
   while ((dirent = g_dir_read_name (dir))) {
-#if GLIB_CHECK_VERSION(2,25,0)
     GStatBuf file_status;
-#else
-    struct stat file_status;
-#endif
 
     filename = g_build_filename (path, dirent, NULL);
     if (g_stat (filename, &file_status) < 0) {

gst/gstregistrybinary.c

@@ -363,11 +363,7 @@ gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
       continue;
 
     if (plugin->flags & GST_PLUGIN_FLAG_CACHED) {
-#if GLIB_CHECK_VERSION(2,25,0)
       GStatBuf statbuf;
-#else
-      struct stat statbuf;
-#endif
 
       if (g_stat (plugin->filename, &statbuf) < 0 ||
           plugin->file_mtime != statbuf.st_mtime ||