Update some signal func vars.

Original commit message from CVS:
Update some signal func vars.

gst/elements/gstfakesink.h

@@ -63,7 +63,7 @@ struct _GstFakeSinkClass {
   GstElementClass parent_class;
 
   /* signals */
-  void (*handoff) (GstElement *element,GstPad *pad);
+  void (*handoff) (GstElement *element, GstBuffer *buf, GstPad *pad);
 };
 
 GtkType gst_fakesink_get_type(void);

gst/elements/gstfakesrc.h

@@ -78,7 +78,7 @@ struct _GstFakeSrcClass {
   GstElementClass parent_class;
 
   /* signals */
-  void (*handoff) (GstElement *element,GstPad *pad);
+  void (*handoff) (GstElement *element, GstBuffer *buf, GstPad *pad);
 };
 
 GtkType gst_fakesrc_get_type(void);

plugins/elements/gstfakesink.h

@@ -63,7 +63,7 @@ struct _GstFakeSinkClass {
   GstElementClass parent_class;
 
   /* signals */
-  void (*handoff) (GstElement *element,GstPad *pad);
+  void (*handoff) (GstElement *element, GstBuffer *buf, GstPad *pad);
 };
 
 GtkType gst_fakesink_get_type(void);

plugins/elements/gstfakesrc.h

@@ -78,7 +78,7 @@ struct _GstFakeSrcClass {
   GstElementClass parent_class;
 
   /* signals */
-  void (*handoff) (GstElement *element,GstPad *pad);
+  void (*handoff) (GstElement *element, GstBuffer *buf, GstPad *pad);
 };
 
 GtkType gst_fakesrc_get_type(void);