[pango] adding allow-none to pango_context_set_matrix parameters

[Alberto Ruiz <aruiz src gnome org>]

commit 54f16645d14ec475ac070e969e883051d2f53add
Author: Alberto Ruiz <aruiz gnome org>
Date:   Mon Apr 25 12:26:26 2011 +0100

    adding allow-none to pango_context_set_matrix parameters

 pango/pango-context.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/pango/pango-context.c b/pango/pango-context.c
index 3c84f3b..7f8a6ad 100644
--- a/pango/pango-context.c
+++ b/pango/pango-context.c
@@ -146,8 +146,8 @@ update_resolved_gravity (PangoContext *context)
 /**
  * pango_context_set_matrix:
  * @context: a #PangoContext
- * @matrix: a #PangoMatrix, or %NULL to unset any existing matrix.
- *  (No matrix set is the same as setting the identity matrix.)
+ * @matrix: (allow-none): a #PangoMatrix, or %NULL to unset any existing
+ * matrix. (No matrix set is the same as setting the identity matrix.)
  *
  * Sets the transformation matrix that will be applied when rendering
  * with this context. Note that reported metrics are in the user space