From 0c02362da257d3535b17206211d8acb98d6d9e27 Mon Sep 17 00:00:00 2001
From: dkf <donal.k.fellows@manchester.ac.uk>
Date: Mon, 28 Apr 2008 08:32:25 +0000
Subject: Forgot to check in critical helper macro!

---
 generic/tkCanvas.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/generic/tkCanvas.h b/generic/tkCanvas.h
index 5909611..877ecfe 100644
--- a/generic/tkCanvas.h
+++ b/generic/tkCanvas.h
@@ -10,7 +10,7 @@
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkCanvas.h,v 1.13 2007/12/13 15:24:13 dgp Exp $
+ * RCS: @(#) $Id: tkCanvas.h,v 1.14 2008/04/28 08:32:25 dkf Exp $
  */
 
 #ifndef _TKCANVAS
@@ -293,7 +293,7 @@ typedef struct TkCanvas {
  */
 
 MODULE_SCOPE int	TkCanvPostscriptCmd(TkCanvas *canvasPtr,
-			    Tcl_Interp *interp, int argc, CONST char **argv);
+			    Tcl_Interp *interp, int argc, const char **argv);
 MODULE_SCOPE int 	TkCanvTranslatePath(TkCanvas *canvPtr,
 			    int numVertex, double *coordPtr, int closed,
 			    XPoint *outPtr);
@@ -305,4 +305,10 @@ MODULE_SCOPE Tk_ItemType tkArcType, tkBitmapType, tkImageType, tkLineType;
 MODULE_SCOPE Tk_ItemType tkOvalType, tkPolygonType;
 MODULE_SCOPE Tk_ItemType tkRectangleType, tkTextType, tkWindowType;
 
+/*
+ * Convenience macro.
+ */
+
+#define Canvas(canvas) ((TkCanvas *) (canvas))
+
 #endif /* _TKCANVAS */
-- 
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