Engine: Fix a small memory leak in the savable implementation
Engine: Fix a small memory leak in the savable implementation

Thank you for Diego Giagio's help.

KDE/gluon,KDE/gluon,KDE/gluon,pranavrc/example-gluon,pranavrc/example-gluon,pranavrc/example-gluon,KDE/gluon,pranavrc/example-gluon