[gimp] plug-ins: fix #5313 Exporting to "Gimp pattern" i.e. pat format fails

[Jacob Boerema <jboerema src gnome org>]

commit 7bb892f3d5da557711ef4e0fccc1b2ea7d2dc8d4
Author: Jacob Boerema <jgboerema gmail com>
Date:   Mon Aug 9 16:28:33 2021 -0400

    plug-ins: fix #5313 Exporting to "Gimp pattern" i.e. pat format fails
    
    After the change that allows multiple layers to be selected exporting to
    a pattern fails.
    
    Patch this as suggested by Lloyd Konneker by doing the same as for brushes:
    do not allow multiple layers, instead only send the first drawable.

 plug-ins/common/file-pat.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/plug-ins/common/file-pat.c b/plug-ins/common/file-pat.c
index 409aa48eb8..024b0a0087 100644
--- a/plug-ins/common/file-pat.c
+++ b/plug-ins/common/file-pat.c
@@ -229,8 +229,7 @@ pat_save (GimpProcedure        *procedure,
                                 "file-pat-save-internal",
                                 GIMP_TYPE_RUN_MODE,     GIMP_RUN_NONINTERACTIVE,
                                 GIMP_TYPE_IMAGE,        image,
-                                G_TYPE_INT,             n_drawables,
-                                GIMP_TYPE_OBJECT_ARRAY, drawables,
+                                GIMP_TYPE_DRAWABLE,     drawables[0],
                                 G_TYPE_FILE,            file,
                                 G_TYPE_STRING,          description,
                                 G_TYPE_NONE);