Fixed QBind<TResult, QJsonArray> (traversal locus was lost)

tests/QBind/QJson_impl.h

@@ -425,7 +425,7 @@ struct QBind<TResult, const QJsonArray> { static TResult bind(Val<TResult> dst,
     static_assert(TResult::Mode==Write,"Cannot Read from TResult into const QJsonArray&");
     auto s(dst.sequence());
     for (auto&& item : src) {
-        s.bind(item);
+        s = s.bind(item);
     }
     return s;
 }};
@@ -434,14 +434,14 @@ struct QBind<TResult, QJsonArray> {
     static TResult bind(Val<TResult> dst, QJsonArray& src, std::enable_if_t<TResult::Mode==Write>* = nullptr) {
         auto s(dst.sequence());
         for (auto item : src) {
-            s.bind(item);
+            s = s.bind(item);
         }
         return s;
     }
     static TResult bind(Val<TResult> src, QJsonArray& dst, std::enable_if_t<TResult::Mode==Read >* = nullptr) {
         auto s(src.sequence());
         QJsonValue v;
-        while (s.bind(v)) {
+        while (s = s.bind(v)) {
             dst.push_back(v);
         }
         return s;