Close fd DataSourceInterface::requestData

Weston does it as well and otherwise the client blocks.

src/wayland/datasource_interface.cpp

@@ -24,6 +24,8 @@ License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 #include <QStringList>
 // Wayland
 #include <wayland-server.h>
+// system
+#include <unistd.h>
 
 namespace KWayland
 {
@@ -100,6 +102,7 @@ void DataSourceInterface::requestData(const QString &mimeType, qint32 fd)
     Q_D();
     // TODO: does this require a sanity check on the possible mimeType?
     wl_data_source_send_send(d->resource, mimeType.toUtf8().constData(), int32_t(fd));
+    close(fd);
 }
 
 void DataSourceInterface::cancel()