[sonic-visualiser] Add reference to upstream report for Qt 4.8 issue

[Michel Alexandre Salim]

commit 28e1318339a5bd5ca197a230264a7d15355dc370
Author: Michel Alexandre Salim <salimma at fedoraproject.org>
Date:   Wed Aug 10 16:46:12 2011 +0200

    Add reference to upstream report for Qt 4.8 issue

 sonic-visualiser.spec |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/sonic-visualiser.spec b/sonic-visualiser.spec
index a4cb0b7..9d1a7a4 100644
--- a/sonic-visualiser.spec
+++ b/sonic-visualiser.spec
@@ -10,6 +10,7 @@ Source0:        http://downloads.sourceforge.net/sv1/sonic-visualiser-%{version}
 Source1:        sonic-visualiser.desktop
 Patch0:         %{name}-1.8-gcc46.patch
 Patch1:         %{name}-1.8-implicit-dso.patch
+# https://code.soundsoftware.ac.uk/issues/258
 Patch2:         %{name}-1.8-no_virt_QObject.patch
 
 %if 0%{?el5}