pvs-studio: Potentially uninitialized pointer 'ret_type' used.

Change-Id: I2f6faf1264a62012724d9fe34352a76ea5491717
Reviewed-on: https://gerrit.libreoffice.org/62096
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

cli_ure/source/climaker/climaker_emit.cxx

@@ -273,7 +273,7 @@ Assembly ^ TypeEmitter::type_resolve(
     ::System::Object ^, ::System::ResolveEventArgs ^ args )
 {
     ::System::String ^ cts_name = args->Name;
-    ::System::Type ^ ret_type;
+    ::System::Type ^ ret_type = nullptr;
 
     iface_entry ^ entry = dynamic_cast< iface_entry ^ >(m_incomplete_ifaces[cts_name] );
     if (nullptr != entry)