[gtkmm] gmmproc: _CLASS_GTKOBJECT(): Make the destructor explicitly noexcept.

[Murray Cumming <murrayc src gnome org>]

commit 1abbc74c7b2659a710144e9583972de8b3ddb60b
Author: Murray Cumming <murrayc murrayc com>
Date:   Mon Aug 31 09:11:30 2015 +0200

    gmmproc: _CLASS_GTKOBJECT(): Make the destructor explicitly noexcept.

 tools/m4/class_gtkobject.m4 |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tools/m4/class_gtkobject.m4 b/tools/m4/class_gtkobject.m4
index fc2c2e5..515d756 100644
--- a/tools/m4/class_gtkobject.m4
+++ b/tools/m4/class_gtkobject.m4
@@ -175,7 +175,7 @@ _IMPORT(SECTION_CC_MOVE_ASSIGNMENT_OPERATOR_INTERFACES)
 
 ifdef(`__BOOL_CUSTOM_DTOR__',`dnl
 ',`dnl
-__CPPNAME__::~__CPPNAME__`'()
+__CPPNAME__::~__CPPNAME__`'() noexcept
 {
   destroy_();
 }
@@ -206,7 +206,7 @@ public:
   __CPPNAME__& operator=(__CPPNAME__&& src);
 
 _IMPORT(SECTION_DTOR_DOCUMENTATION)
-  virtual ~__CPPNAME__`'();
+  virtual ~__CPPNAME__`'() noexcept;
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS