Explicitely check for gtk when enabling telepathy

This is needed in tubes.

Change-Id: Ia77968a68da4e781c6e5d4c202b3e5f751f1c952
Signed-off-by: Tomas Chvatal <tchvatal@suse.cz>
Reviewed-on: https://gerrit.libreoffice.org/1904Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>

configure.ac

@@ -9686,7 +9686,7 @@ if test "$_os" != "WINNT" -a "$_os" != "Darwin" -a "$enable_telepathy" = "yes";
     ENABLE_TELEPATHY="TRUE"
     AC_DEFINE(ENABLE_TELEPATHY)
     AC_MSG_RESULT([yes])
-    PKG_CHECK_MODULES( TELEPATHY, telepathy-glib >= 0.18.0 glib-2.0 gobject-2.0 gthread-2.0 gio-2.0 )
+    PKG_CHECK_MODULES( TELEPATHY, telepathy-glib >= 0.18.0 glib-2.0 gobject-2.0 gthread-2.0 gio-2.0 gtk+-2.0 >= 2.4 )
 else
     AC_MSG_RESULT([no])
 fi