Add patch to reinstate extra gtk_marshal_ symbols

gtkmarshal.c in GTK 2.24.32 was generated by a version of
glib-genmarshal that produced unintended symbols. It was regenerated
for 2.24.33, but it looks as though a few packages might already be
referring to those symbols. Patch them back in for ABI compatibility.

debian/patches/Reinstate-marshallers-that-accidentally-became-part-of-th.patch

@@ -0,0 +1,56 @@
+From: Simon McVittie <smcv@debian.org>
+Date: Mon, 28 Dec 2020 15:13:02 +0000
+Subject: Reinstate marshallers that accidentally became part of the ABI
+
+gtkmarshal.c in GTK 2.24.32 was generated by a version of
+glib-genmarshal that produced unintended symbols. It was regenerated
+for 2.24.33, but it looks as though a few packages might already be
+referring to those symbols. Patch them back in for ABI compatibility.
+
+Forwarded: not-needed
+---
+ gtk/gtkmisc.c | 32 ++++++++++++++++++++++++++++++++
+ 1 file changed, 32 insertions(+)
+
+diff --git a/gtk/gtkmisc.c b/gtk/gtkmisc.c
+index ff1c2ff..79b72a4 100644
+--- a/gtk/gtkmisc.c
++++ b/gtk/gtkmisc.c
+@@ -339,5 +339,37 @@ gtk_misc_realize (GtkWidget *widget)
+     }
+ }
+ 
++
++#define MARSHALLER(name) \
++G_MODULE_EXPORT \
++void gtk_marshal_ ## name (GClosure *closure, \
++                           GValue *return_value, \
++                           guint n_param_values, \
++                           const GValue *param_values, \
++                           gpointer invocation_hint, \
++                           gpointer marshal_data); \
++void \
++gtk_marshal_ ## name (GClosure *closure, \
++                      GValue *return_value, \
++                      guint n_param_values, \
++                      const GValue *param_values, \
++                      gpointer invocation_hint, \
++                      gpointer marshal_data) \
++{ \
++  g_cclosure_marshal_ ## name (closure, return_value, n_param_values, \
++                               param_values, invocation_hint, \
++                               marshal_data); \
++}
++
++MARSHALLER (VOID__BOOLEAN)
++MARSHALLER (VOID__BOXED)
++MARSHALLER (VOID__ENUM)
++MARSHALLER (VOID__INT)
++MARSHALLER (VOID__OBJECT)
++MARSHALLER (VOID__POINTER)
++MARSHALLER (VOID__STRING)
++MARSHALLER (VOID__UINT)
++MARSHALLER (VOID__VOID)
++
+ #define __GTK_MISC_C__
+ #include "gtkaliasdef.c"

debian/patches/series

@@ -6,3 +6,4 @@
 060_ignore-random-icons.patch
 061_use_pdf_as_default_printing_standard.patch
 098_multiarch_module_path.patch
+Reinstate-marshallers-that-accidentally-became-part-of-th.patch