replace g_type_class_ref() by g_type_class_peek_parent() to avoid counter incrementation

Author: jjceresa

libinstpatch/IpatchSF2.c

@@ -134,7 +134,7 @@ ipatch_sf2_class_init(IpatchSF2Class *klass)
     IpatchBaseClass *base_class = IPATCH_BASE_CLASS(klass);
     GParamSpec **sp = &info_prop_pspecs[0];
 
-    parent_class = g_type_class_ref(IPATCH_TYPE_BASE);
+    parent_class = g_type_class_peek_parent(klass);
 
     obj_class->finalize = ipatch_sf2_finalize;
     obj_class->get_property = ipatch_sf2_get_property;

libinstpatch/IpatchSF2Inst.c

@@ -127,7 +127,7 @@ ipatch_sf2_inst_class_init(IpatchSF2InstClass *klass)
     IpatchItemClass *item_class = IPATCH_ITEM_CLASS(klass);
     IpatchContainerClass *container_class = IPATCH_CONTAINER_CLASS(klass);
 
-    parent_class = g_type_class_ref(IPATCH_TYPE_CONTAINER);
+    parent_class = g_type_class_peek_parent(klass);
 
     obj_class->finalize = ipatch_sf2_inst_finalize;
     obj_class->get_property = ipatch_sf2_inst_get_property;

libinstpatch/IpatchSF2Preset.c

@@ -132,7 +132,7 @@ ipatch_sf2_preset_class_init(IpatchSF2PresetClass *klass)
     IpatchItemClass *item_class = IPATCH_ITEM_CLASS(klass);
     IpatchContainerClass *container_class = IPATCH_CONTAINER_CLASS(klass);
 
-    parent_class = g_type_class_ref(IPATCH_TYPE_CONTAINER);
+    parent_class = g_type_class_peek_parent(klass);
 
     obj_class->finalize = ipatch_sf2_preset_finalize;
     obj_class->get_property = ipatch_sf2_preset_get_property;

libinstpatch/IpatchSLIInst.c

@@ -105,7 +105,7 @@ ipatch_sli_inst_class_init(IpatchSLIInstClass *klass)
     IpatchItemClass *item_class = IPATCH_ITEM_CLASS(klass);
     IpatchContainerClass *container_class = IPATCH_CONTAINER_CLASS(klass);
 
-    parent_class = g_type_class_ref(IPATCH_TYPE_CONTAINER);
+    parent_class = g_type_class_peek_parent(klass);
 
     obj_class->finalize = ipatch_sli_inst_finalize;
     obj_class->get_property = ipatch_sli_inst_get_property;