Fix 32 bit compilation

The class wxTextFieldCell was still declared, but not defined for 32 bit builds, move the define to NSTextFieldCell into the header.

include/wx/osx/cocoa/dataview.h

@@ -372,10 +372,13 @@ private:
 // NSTextFieldCell customized to allow vertical alignment
 // ============================================================================
 
+#ifndef __LP64__
+    #define wxTextFieldCell NSTextFieldCell
+#else
 @interface wxTextFieldCell : NSTextFieldCell
     -(void) setWXAlignment:(int)alignment;
 @end
-
+#endif
 
 // ============================================================================
 // wxImageTextCell

src/osx/cocoa/dataview.mm

@@ -1258,7 +1258,6 @@ outlineView:(NSOutlineView*)outlineView
     //      error: instance variables may not be placed in class extension
     //
     // Until this can be fixed, disable it to at least fix compilation.
-    #define wxTextFieldCell NSTextFieldCell
 #else
 @interface wxTextFieldCell ()
 {