[gimp/wip/Jehan/CI-Windows: 20/21] libgimp: fix meson build.

[Jehan <jehanp src gnome org>]

commit f87ae8cc6c99ca7ce0ee0428f9d6ef7f31dbc6de
Author: Jehan <jehan girinstud io>
Date:   Mon Sep 30 19:35:39 2019 +0200

    libgimp: fix meson build.

 libgimp/meson.build | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/libgimp/meson.build b/libgimp/meson.build
index 5ae1d1ead0..47678de619 100644
--- a/libgimp/meson.build
+++ b/libgimp/meson.build
@@ -242,6 +242,7 @@ libgimpui_sources_introspectable = [
 libgimpui_sources = [
   libgimpui_sources_introspectable,
   gimpuimarshal,
+  'gimpprocedureconfig.c',
 ]
 
 libgimpui_headers_introspectable = [