ges: Fix old style function

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8229>

subprojects/gst-editing-services/ges/ges-timeline-tree.c

@@ -161,13 +161,13 @@ new_snapped_position (GstClockTime distance)
 }
 
 static GHashTable *
-new_edit_table ()
+new_edit_table (void)
 {
   return g_hash_table_new_full (NULL, NULL, NULL, g_free);
 }
 
 static GHashTable *
-new_position_table ()
+new_position_table (void)
 {
   return g_hash_table_new_full (NULL, NULL, NULL, g_free);
 }

subprojects/gst-editing-services/plugins/ges/gesdemux.c

@@ -86,7 +86,7 @@ enum
 static GParamSpec *properties[PROP_LAST];
 
 static GstCaps *
-ges_demux_get_sinkpad_caps ()
+ges_demux_get_sinkpad_caps (void)
 {
   GList *tmp, *formatters;
   GstCaps *sinkpad_caps = gst_caps_new_empty ();

subprojects/gst-editing-services/plugins/nle/validate.c

@@ -133,7 +133,7 @@ clean:
 NLE_END_VALIDATE_ACTION;
 
 static void
-register_action_types ()
+register_action_types (void)
 {
   GST_DEBUG_CATEGORY_INIT (nle_validate_debug, "nlevalidate",
       GST_DEBUG_FG_BLUE | GST_DEBUG_BOLD, "NLE validate");
@@ -164,7 +164,7 @@ register_action_types ()
 
 
 void
-nle_validate_init ()
+nle_validate_init (void)
 {
   register_action_types ();
 }

subprojects/gst-editing-services/tests/check/nle/tempochange.c

@@ -636,7 +636,7 @@ GST_START_TEST (test_tempochange_seek)
 GST_END_TEST;
 
 static void
-late_ges_init ()
+late_ges_init (void)
 {
   /* We need to do this inside the test cases, not during the initialization
    * of the suite, as ges_init() will initialize thread pools, which cannot