Fix UiPublicMember::lastSourceLocation.

Mirrors http://codereview.qt.nokia.com/#change,755

Change-Id: I7d1222bda67344456710ada52af33d17688627ca
Reviewed-on: http://codereview.qt.nokia.com/757
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

src/libs/qmljs/parser/qmljsast_p.h

@@ -2356,6 +2356,8 @@ public:
     {
       if (binding)
           return binding->lastSourceLocation();
+      if (statement)
+          return statement->lastSourceLocation();
 
       return semicolonToken;
     }