[mutter] cogl/framebuffer: Add COGL_EXPORT to public function

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

commit d57bdb0b4471e36e358e2cb69684065bf07ad8b3
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Dec 9 19:24:52 2020 -0300

    cogl/framebuffer: Add COGL_EXPORT to public function
    
    An oversight of 038a3170bf971a6.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1627>

 cogl/cogl/cogl-framebuffer.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/cogl/cogl/cogl-framebuffer.h b/cogl/cogl/cogl-framebuffer.h
index 688c35f762..fab99ef2c0 100644
--- a/cogl/cogl/cogl-framebuffer.h
+++ b/cogl/cogl/cogl-framebuffer.h
@@ -1559,7 +1559,7 @@ cogl_blit_framebuffer (CoglFramebuffer *framebuffer,
  *
  * Unlike cogl_framebuffer_finish(), this does not block the CPU.
  */
-void
+COGL_EXPORT void
 cogl_framebuffer_flush (CoglFramebuffer *framebuffer);
 
 G_END_DECLS