refs #488, workaround for gcc bug.

Should be reverted when we have gcc > 4.7

src/blackmisc/pixmap.h

@@ -65,8 +65,9 @@ namespace BlackMisc
     };
 } // namespace
 
+//! \todo remove flags when gcc 4.7 streaming issue is resolved
 BLACK_DECLARE_TUPLE_CONVERSION(BlackMisc::CPixmap, (
-                                   attr(o.m_array)
+                                   attr(o.m_array, flags<DisabledForJson>())
                                ))
 Q_DECLARE_METATYPE(BlackMisc::CPixmap)