[gegl] text: use cairo-ARGB32 as babl format

[Øyvind Kolås <ok src gnome org>]

commit 0111b735dcbb72dc2a5e1bf3ea5d5550914d80e2
Author: Øyvind Kolås <pippin gimp org>
Date:   Mon May 15 22:10:28 2017 +0200

    text: use cairo-ARGB32 as babl format

 operations/external/text.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/operations/external/text.c b/operations/external/text.c
index 4036034..0f70a5f 100644
--- a/operations/external/text.c
+++ b/operations/external/text.c
@@ -218,7 +218,7 @@ process (GeglOperation       *operation,
   cairo_translate (cr, -result->x, -result->y);
   text_layout_text (self, cr, 0, NULL);
 
-  gegl_buffer_set (output, result, 0, babl_format ("B'aG'aR'aA u8"), data,
+  gegl_buffer_set (output, result, 0, babl_format ("cairo-ARGB32"), data,
                    GEGL_AUTO_ROWSTRIDE);
 
   cairo_destroy (cr);