[gimp] Issue #1841 - Export As... mng swaps width and height

[Michael Natterer <mitch src gnome org>]

commit 44b469e49352eae74994d29576271d2a2feb0168
Author: Michael Natterer <mitch gimp org>
Date:   Fri Jul 13 17:55:19 2018 +0200

    Issue #1841 - Export As... mng swaps width and height
    
    layer_cols and layer_rows were swapped.

 plug-ins/common/file-mng.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/plug-ins/common/file-mng.c b/plug-ins/common/file-mng.c
index f8398fb550..f626597f9b 100644
--- a/plug-ins/common/file-mng.c
+++ b/plug-ins/common/file-mng.c
@@ -849,8 +849,8 @@ mng_save_image (const gchar  *filename,
       layer_drawable_type = gimp_drawable_type (layers[i]);
 
       layer_buffer        = gimp_drawable_get_buffer (layers[i]);
-      layer_rows          = gegl_buffer_get_width  (layer_buffer);
-      layer_cols          = gegl_buffer_get_height (layer_buffer);
+      layer_cols          = gegl_buffer_get_width  (layer_buffer);
+      layer_rows          = gegl_buffer_get_height (layer_buffer);
 
       gimp_drawable_offsets (layers[i], &layer_offset_x, &layer_offset_y);
       layer_has_unique_palette = TRUE;