[gimp] libgimpbase: forgot to add gimp_pixpipe_params_free() in gimpbase.def.

[Jehan <jehanp src gnome org>]

commit 1a8bf4bcaf819b9351a070e3be66e01a147395c5
Author: Jehan <jehan girinstud io>
Date:   Thu Jun 28 01:36:40 2018 +0200

    libgimpbase: forgot to add gimp_pixpipe_params_free() in gimpbase.def.

 libgimpbase/gimpbase.def | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/libgimpbase/gimpbase.def b/libgimpbase/gimpbase.def
index 937301e73b..c43f78da45 100644
--- a/libgimpbase/gimpbase.def
+++ b/libgimpbase/gimpbase.def
@@ -129,6 +129,7 @@ EXPORTS
        gimp_personal_rc_file
        gimp_pixels_to_units
        gimp_pixpipe_params_build
+       gimp_pixpipe_params_free
        gimp_pixpipe_params_init
        gimp_pixpipe_params_parse
        gimp_plug_in_directory