use :: when referring to wxDefaultSize or wxDefaultPosition

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60266 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/generic/spinctrg.h

@@ -43,11 +43,11 @@ public:
         @param id
             Window identifier. The value wxID_ANY indicates a default value.
         @param pos
-            Window position. If wxDefaultPosition is specified then a default
-        position is chosen.
+            Window position. 
+            If ::wxDefaultPosition is specified then a default position is chosen.
         @param size
-            Window size. If wxDefaultSize is specified then a default size
-        is chosen.
+            Window size. 
+            If ::wxDefaultSize is specified then a default size is chosen.
         @param style
             Window style. See wxSpinButton.
         @param min