QVariants of null pointers should be null

Changes the QVariant::isNull() implementation for
pointer types so they return true if null.

[ChangeLog][QVariant] QVariants containing pointers will now return
true on isNull() if the contained pointer is null.

Change-Id: I8aa0dab482403837073fb2f376a46126cc3bc6b2
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/corelib/kernel/qvariant_p.h b/src/corelib/kernel/qvariant_p.h
index 487949431c..75c269d710 100644
--- a/src/corelib/kernel/qvariant_p.h
+++ b/src/corelib/kernel/qvariant_p.h
@@ -187,6 +187,16 @@ public:
     }
 };
 
+template <typename T>
+struct PrimitiveIsNull<T*>
+{
+public:
+    static bool isNull(const QVariant::Private *d)
+    {
+        return d->is_null || d->data.ptr == nullptr;
+    }
+};
+
 template <>
 struct PrimitiveIsNull<std::nullptr_t>
 {