[gtk+/wip/frame-synchronization] Small documentation fixes for frame synchronization

[Owen Taylor <otaylor src gnome org>]

commit 9db6a6aea0bd03eb82e1834fb01c8927776147a2
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Thu Feb 14 13:50:55 2013 -0500

    Small documentation fixes for frame synchronization
    
    Found by Benjamin Otte

 gdk/gdkframeclock.h   |    4 ++--
 gtk/gtkstylecontext.c |    3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/gdk/gdkframeclock.h b/gdk/gdkframeclock.h
index 7b011ca..f652979 100644
--- a/gdk/gdkframeclock.h
+++ b/gdk/gdkframeclock.h
@@ -50,7 +50,7 @@ typedef struct _GdkFrameClockClass         GdkFrameClockClass;
  * GdkFrameClockPhase:
  * @GDK_FRAME_CLOCK_PHASE_NONE: no phase
  * @GDK_FRAME_CLOCK_PHASE_FLUSH_EVENTS: corresponds to GdkFrameClock::flush-events. Should not be handled by 
applications.
- * @GDK_FRAME_CLOCK_PHASE_BEFORE_PAINT: corresponds to GdkFrameClock::flush-events. Should not be handled by 
applications.
+ * @GDK_FRAME_CLOCK_PHASE_BEFORE_PAINT: corresponds to GdkFrameClock::before-paint. Should not be handled by 
applications.
  * @GDK_FRAME_CLOCK_PHASE_UPDATE: corresponds to GdkFrameClock::update.
  * @GDK_FRAME_CLOCK_PHASE_LAYOUT: corresponds to GdkFrameClock::layout.
  * @GDK_FRAME_CLOCK_PHASE_PAINT: corresponds to GdkFrameClock::paint.
@@ -61,7 +61,7 @@ typedef struct _GdkFrameClockClass         GdkFrameClockClass;
  * phases that can be requested. The element of the enumeration
  * correspond to the signals of #GdkPaintClock.
  *
- * Since: 3.4
+ * Since: 3.8
  **/
 typedef enum {
   GDK_FRAME_CLOCK_PHASE_NONE          = 0,
diff --git a/gtk/gtkstylecontext.c b/gtk/gtkstylecontext.c
index a57873c..7fa5ee7 100644
--- a/gtk/gtkstylecontext.c
+++ b/gtk/gtkstylecontext.c
@@ -2676,7 +2676,8 @@ gtk_style_context_set_frame_clock (GtkStyleContext *context,
  *
  * Returns the #GdkFrameClock to which @context is attached.
  *
- * Returns: (transfer none): a #GdkFrameClock.
+ * Returns: (transfer none): a #GdkFrameClock, or %NULL
+ *  if @context does not have an attached frame clock.
  * Since: 3.8
  **/
 GdkFrameClock *