[glib/gtype-leak-suppression] glib.supp: add suppression for g_type_class_ref()

[Claudio Saavedra <csaavedra src gnome org>]

commit 6e4a02b9bcaac2eaa73ce4cfcb8b2c88194fab28
Author: Claudio Saavedra <csaavedra igalia com>
Date:   Fri Aug 30 09:26:31 2019 +0300

    glib.supp: add suppression for g_type_class_ref()
    
    This suppression is not caught by glib.supp, so add it:
    
    ==21145== 32 bytes in 1 blocks are possibly lost in loss record 1,456 of 2,584
    ==21145==    at 0x4837B65: calloc (vg_replace_malloc.c:762)
    ==21145==    by 0x495825E: g_malloc0 (gmem.c:129)
    ==21145==    by 0x4A6B6EB: type_class_init_Wm (gtype.c:2134)
    ==21145==    by 0x4A6D22A: g_type_class_ref (gtype.c:2950)
    ==21145==    by 0x4A6D1DD: g_type_class_ref (gtype.c:2942)
    ==21145==    by 0x4A5C9C6: g_param_spec_enum (gparamspecs.c:2085)

 glib.supp | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/glib.supp b/glib.supp
index 2c20b1238..00c8dedc9 100644
--- a/glib.supp
+++ b/glib.supp
@@ -322,6 +322,16 @@
        fun:type_class_init_Wm
 }
 
+{
+        g-type-class-ref
+        Memcheck:Leak
+        fun:calloc
+        ...
+        fun:type_class_init_Wm
+        ...
+        fun:g_type_class_ref
+}
+
 {
        g-io-module-default-singleton-malloc
        Memcheck:Leak