[gegl] update some docs

[Michael Murà <mmure src gnome org>]

commit 43fe304762d9709d08d9aca936bc1ddfc9a87bb2
Author: Michael Murà <batolettre gmail com>
Date:   Fri Mar 23 16:48:24 2012 +0900

    update some docs

 gegl/buffer/gegl-buffer.h        |    2 +-
 gegl/property-types/gegl-color.h |    1 +
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer.h b/gegl/buffer/gegl-buffer.h
index 2269094..254cb35 100644
--- a/gegl/buffer/gegl-buffer.h
+++ b/gegl/buffer/gegl-buffer.h
@@ -273,7 +273,7 @@ void            gegl_buffer_set_color         (GeglBuffer          *buffer,
 /**
  * gegl_buffer_set_pattern:
  * @buffer: a #GeglBuffer
- * @roi: a rectangular region
+ * @rect: a rectangular region
  * @pattern: a #GeglBuffer to be repeated as a pattern
  * @x_offset: where the pattern starts horizontally
  * @y_offset: where the pattern starts vertical
diff --git a/gegl/property-types/gegl-color.h b/gegl/property-types/gegl-color.h
index 87082e4..1271071 100644
--- a/gegl/property-types/gegl-color.h
+++ b/gegl/property-types/gegl-color.h
@@ -122,6 +122,7 @@ void         gegl_color_set_pixel              (GeglColor   *color,
 /**
  * gegl_color_get_pixel:
  * @color: a #GeglColor
+ * @format: a babl pixel format
  * @pixel: pointer to a pixel
  *
  * Store the color in a pixel in the given format.