set best size after filling the control with strings

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27077 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/listbox.cpp

@@ -184,6 +184,9 @@ bool wxListBox::Create(wxWindow *parent,
         Append(choices[i]);
     }
 
+    // now we can compute our best size correctly, so do it if necessary
+    SetBestSize(size);
+
     return true;
 }