[glibmm] Glib::TypeTraits<>: Avoid warnings when compiling with -Wcast-qual.

[Kjell Ahlstedt <kjellahl src gnome org>]

commit f8154728e116e04571522bd416a5322836d4f6d4
Author: Kjell Ahlstedt <kjell ahlstedt bredband net>
Date:   Wed Jul 24 13:29:57 2013 +0200

    Glib::TypeTraits<>: Avoid warnings when compiling with -Wcast-qual.
    
    * glib/glibmm/containerhandle_shared.h: Move const_cast<CTypeNonConst>(ptr)
    from the TypeTraits< Glib::RefPtr<T> > specialization to the
    TypeTraits< Glib::RefPtr<const T> > specialization, thus avoiding warnings
    when compiling with -Wcast-qual. Bug #704640.

 glib/glibmm/containerhandle_shared.h |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/glib/glibmm/containerhandle_shared.h b/glib/glibmm/containerhandle_shared.h
index e9094c9..ddb7787 100644
--- a/glib/glibmm/containerhandle_shared.h
+++ b/glib/glibmm/containerhandle_shared.h
@@ -121,7 +121,7 @@ struct TypeTraits
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS /* hide the specializations */
 
-//For some (proably, more spec-compliant) compilers, these specializations must
+//For some (probably, more spec-compliant) compilers, these specializations must
 //be next to the objects that they use.
 #ifdef GLIBMM_CAN_USE_DYNAMIC_CAST_IN_UNUSED_TEMPLATE_WITHOUT_DEFINITION
 
@@ -208,7 +208,7 @@ struct TypeTraits< Glib::RefPtr<T> >
     //because we can not use a specific Glib::wrap(CType) overload here,
     //because that would be "dependent", and g++ 3.4 does not allow that.
     //The specific Glib::wrap() overloads don't do anything special anyway.
-    GObject* cobj = (GObject*)const_cast<CTypeNonConst>(ptr);
+    GObject* cobj = (GObject*)(ptr);
     return Glib::RefPtr<T>( dynamic_cast<T*>(Glib::wrap_auto(cobj, true /* take_copy */)) );
     //We use dynamic_cast<> in case of multiple inheritance.
   }
@@ -244,7 +244,7 @@ struct TypeTraits< Glib::RefPtr<const T> >
     //because we can not use a specific Glib::wrap(CType) overload here,
     //because that would be "dependent", and g++ 3.4 does not allow that.
     //The specific Glib::wrap() overloads don't do anything special anyway.
-    GObject* cobj = (GObject*)(ptr);
+    GObject* cobj = (GObject*)const_cast<CTypeNonConst>(ptr);
     return Glib::RefPtr<const T>( dynamic_cast<const T*>(Glib::wrap_auto(cobj, true /* take_copy */)) );
     //We use dynamic_cast<> in case of multiple inheritance.
   }