sw: it's called SwAnchoredDrawObject, not SwDrawFrame

It is named like this since its addition in commit
20db95b7 (INTEGRATION: CWS
swdrawpositioning (1.1.2); FILE ADDED, 2004-06-28).

Change-Id: I776bc736e8fe25c103858f33b7e9ad425890616e

sw/inc/anchoredobject.hxx

@@ -38,7 +38,7 @@ class SwFormatAnchor;
 
     Purpose of this class is to provide a unified interface for the positioning
     of Writer fly frames (derived classes of <SwFlyFrame>) and of drawing objects
-    (derived classes of <SwDrawFrame>).
+    (derived classes of <SwAnchoredDrawObject>).
 
     @author OD
 */