No real changes, just remove leading underscore from variables

Now that these variables are in a public header, don't use leading underscores
for them, if only for consistency with all the others.

include/wx/osx/cocoa/dataview.h

@@ -378,8 +378,8 @@ private:
 @interface wxTextFieldCell : NSTextFieldCell
 {
 @private
-    int _wxAlignment;
-    BOOL _adjustRect;
+    int wxAlignment;
+    BOOL adjustRect;
 }
 
     -(void) setWXAlignment:(int)alignment;