Fix memory leak in _pygi_argument_to_array()
Fix memory leak in _pygi_argument_to_array()

Free the originally allocated GArray data before setting it to our already
existing C array.

Discovered by test_gi.TestStructure.test_boxed_struct_return test case.

sfeltman/pygobject,sfeltman/pygobject,sfeltman/pygobject,davibe/pygobject,davibe/pygobject,GNOME/pygobject,pexip/pygobject,GNOME/pygobject,davibe/pygobject,GNOME/pygobject,pexip/pygobject,davibe/pygobject,pexip/pygobject