Append all items at once during wxChoice creation in wxMSW.

Appending all items at once is more efficient than doing it one by one in the
loop 9probably because of CB_INITSTORAGE that we send in this case).

Closes #13899.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70454 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/choice.cpp

@@ -86,10 +86,7 @@ bool wxChoice::CreateAndInit(wxWindow *parent,
 
 
     // initialize the controls contents
-    for ( int i = 0; i < n; i++ )
+    Append(n, choices);
-    {
-        Append(choices[i]);
-    }
 
     // and now we may finally size the control properly (if needed)
     SetInitialSize(size);