[glibmm] C++11: Variant: Replace more throw(std::bad_cast) with noexcept(false).

[Murray Cumming <murrayc src gnome org>]

commit 1a72cf56c6c743db298aad4617a49e2f6d3aa176
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Apr 4 20:34:13 2017 +0200

    C++11: Variant: Replace more throw(std::bad_cast) with noexcept(false).
    
    This is necessary for C++17 which completely removes dynamic
    exception specifications.
    See https://bugzilla.redhat.com/show_bug.cgi?id=1438766

 glib/src/variant.hg |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/glib/src/variant.hg b/glib/src/variant.hg
index bf5040b..be7452b 100644
--- a/glib/src/variant.hg
+++ b/glib/src/variant.hg
@@ -248,7 +248,7 @@ private:
 
 template<class V_CastTo>
 V_CastTo VariantBase::cast_dynamic(const VariantBase& v)
-throw(std::bad_cast)
+noexcept(false)
 {
   if(!(v.gobj()))
   {
@@ -410,7 +410,7 @@ protected:
 
 template<>
 VariantContainerBase VariantBase::cast_dynamic<VariantContainerBase>(const VariantBase& v)
-throw(std::bad_cast);
+noexcept(false);
 
 /** Template class used for the specialization of the Variant<> classes.
  * @newin{2,28}