[gnome-build-meta/ebassi/gdk-pixbuf-rst2man] sdk: Disable gdk-pixbuf man pages

[Marge Bot <marge-bot src gnome org>]

commit ed5b4efce7aae18a5a78adf5b9e9342f1273b5ec
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri May 13 15:33:43 2022 +0100

    sdk: Disable gdk-pixbuf man pages
    
    They are not really useful anyway, and the change to reStructuredText
    broke the build.
    
    Part-of: <https://gitlab.gnome.org/GNOME/gnome-build-meta/-/merge_requests/1600>

 elements/sdk/gdk-pixbuf.bst | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/elements/sdk/gdk-pixbuf.bst b/elements/sdk/gdk-pixbuf.bst
index b5298d193..62ba5cad5 100644
--- a/elements/sdk/gdk-pixbuf.bst
+++ b/elements/sdk/gdk-pixbuf.bst
@@ -21,6 +21,7 @@ depends:
 variables:
   meson-local: >-
     -Dgtk_doc=true
+    -Dman=false
 
 public:
   bst: