don't remove docs for wxThreadHelper::Create; list it in deprecated methods changelog section

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57372 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -235,6 +235,8 @@ Deprecated methods and their replacements
   it with SetDeviceClippingRegion() if this was the correct thing to do in your
   code.
 - wxTE_AUTO_SCROLL style is deprecated as it's always on by default anyhow.
+- wxThreadHelper::Create() has been deprecated in favour of wxThreadHelper::CreateThread
+  which has a better name for a mix-in class, and allows setting the thread type.
 
 
 Major new features in this release

interface/wx/thread.h

@@ -454,6 +454,12 @@ public:
     */
     virtual ExitCode Entry() = 0;
 
+    /**
+        @deprecated
+        Use CreateThread() instead.
+    */
+    wxThreadError Create(unsigned int stackSize = 0);
+
     /**
         Creates a new thread of the given @a kind.