Fix clang 15 build: cope with pango functions formerly exported

Drop the binding for pango_font_map_get_shape_engine_type().
pango_font_metrics_new() is trickier since it's used in several places,
so provide a local declaration instead.  ok ajacoutot@ (maintainer)

x11/py-gtk2/Makefile

@@ -5,7 +5,7 @@ COMMENT=	GTK+2 Python bindings
 GNOME_PROJECT=	pygtk
 GNOME_VERSION=	2.24.0
 PKGNAME=	py-gtk2-${VERSION}
-REVISION=	12
+REVISION=	13
 
 CATEGORIES=	x11
 

x11/py-gtk2/patches/patch-pango_defs

@@ -3,6 +3,8 @@ From: Jordan Petridis <jpetridis@gnome.org>
 Date: Thu, 24 Oct 2019 22:58:36 +0200
 Subject: [PATCH] Drop the PangoFont find_shaper virtual method
 
+Hunk #2: drop get_shape_engine_type, not exported any more.
+
 Index: pango.defs
 --- pango.defs.orig
 +++ pango.defs
@@ -22,3 +24,16 @@ Index: pango.defs
  (define-virtual get_glyph_extents
    (of-object "PangoFont")
    (return-type "none")
+@@ -1465,12 +1456,6 @@
+     '("PangoFontFamily***" "families")
+     '("int*" "n_families")
+   )
+-)
+-
+-(define-method get_shape_engine_type
+-  (of-object "PangoFontMap")
+-  (c-name "pango_font_map_get_shape_engine_type")
+-  (return-type "const-char*")
+ )
+ 
+ (define-method create_context

x11/py-gtk2/patches/patch-pango_override

@@ -0,0 +1,15 @@
+Provide decl for pango_font_metrics_new(), not declared in a public header
+any more.
+
+Index: pango.override
+--- pango.override.orig
++++ pango.override
+@@ -27,6 +27,8 @@ headers
+ #include <pygobject.h>
+ #include <pango/pango.h>
+ 
++PangoFontMetrics *pango_font_metrics_new(void);
++
+ typedef struct {
+     PyObject *func, *data;
+ } PyGtkCustomNotify;