libglademm: fix build against gtkmm-2.24.3

Fixes Homebrew/homebrew#19416.
Closes Homebrew/homebrew#19558.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/libglademm.rb

@@ -10,6 +10,12 @@ class Libglademm < Formula
   depends_on 'libglade'
   depends_on :x11
 
+  def patches
+    # fixes build against gtkmm-2.24.3
+    # libglademm hasn't changed upstream since 2008
+    DATA
+  end
+
   def install
     system "./configure", "--disable-dependency-tracking",
                           "--prefix=#{prefix}",
@@ -17,3 +23,30 @@ class Libglademm < Formula
     system "make install"
   end
 end
+
+__END__
+diff --git a/examples/derived/main.cc b/examples/derived/main.cc
+index 5a72f63..38afc96 100644
+--- a/examples/derived/main.cc
++++ b/examples/derived/main.cc
+@@ -16,6 +16,7 @@
+  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+  */
+
++#include <gtkmm.h>
+ #include "deriveddialog.h"
+ #include <iostream>
+
+diff --git a/examples/variablesmap/main.cc b/examples/variablesmap/main.cc
+index 145c93d..0c41840 100644
+--- a/examples/variablesmap/main.cc
++++ b/examples/variablesmap/main.cc
+@@ -16,7 +16,7 @@
+  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+  */
+
+-#include <gtkmm/main.h>
++#include <gtkmm.h>
+ #include "examplewindow.h"
+
+ int main (int argc, char *argv[])