[gtkmm] Fix the make check build.

[Murray Cumming <murrayc src gnome org>]

commit 4ad5f51dac5e815aefca04f42268b86a71044b22
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Nov 2 12:49:31 2010 +0100

    Fix the make check build.
    
      * gtk/gtkmm.h: Add a gdkmm/dragcontext.h include that fixes a weird
      compilation problem in the tests (during make check). We need to find out
      what the real problem is.

 ChangeLog   |    8 +++++++-
 gtk/gtkmm.h |    4 ++++
 2 files changed, 11 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index d6f9a3b..031f1f2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2010-11-02  Murray Cumming  <murrayc murrayc com>
 
+  * gtk/gtkmm.h: Add a gdkmm/dragcontext.h include that fixes a weird
+  compilation problem in the tests (during make check). We need to find out
+  what the real problem is.
+
+2010-11-02  Murray Cumming  <murrayc murrayc com>
+
 	Avoid includes of gtk/gtk.h.
 
 	* gtk/src/activatable.hg:
@@ -37,7 +43,7 @@
 	* gtk/src/scrollable.hg: Added get/set_h/vscroll_policy() and properties.
 	* tools/m4/convert_gtk.m4: Mention ScrollablePolicy.
 	* gtk/src/widget.hg: Remove get_snapshot() because it was removed from GTK+.
-	Added in_destruction.
+	Added in_destruction().
 
 2010-11-01  José Alburquerque  <jaalburqu svn gnome org>
 
diff --git a/gtk/gtkmm.h b/gtk/gtkmm.h
index ddcce62..8d03191 100644
--- a/gtk/gtkmm.h
+++ b/gtk/gtkmm.h
@@ -86,8 +86,12 @@ extern const int gtkmm_micro_version;
 
 #include <glibmm.h>
 #include <giomm.h>
+
+#include <gdkmm/dragcontext.h> //TODO: Remove this. It works around a strange compilation problem with Cairo::Surface in the tests.
+
 #include <gdkmm.h>
 
+
 #include <gtkmm/object.h>
 #include <gtkmm/aboutdialog.h>
 #include <gtkmm/accelkey.h>