Fails to compile with -Werror=use-after-free enabled for recent GCC

[nodakai]

Looks like a real bug to me, not a false alarm.

solarcapture/src/core/sc_vi.c

Lines 73 to 77 in 2fd9eb9

	free(vi_group);
	return sc_set_err(tg, EINVAL, "ERROR: %s: Set strip_fcs=%"PRId64", but interface"
	" %s set to %d\n", __func__,
	attr->strip_fcs, fcs_interface,
	vi_group->sc_vi_group.svg_strip_fcs);

In file included from include/sc_internal.h:26,
                 from core/internal.h:13,
                 from core/sc_vi.c:6:
core/sc_vi.c: In function 'sc_vi_group_alloc__ef_vi':
include/sc_internal/utils.h:104:3: error: pointer 'vi_group' used after 'free' [-Werror=use-after-free]
  104 |   __sc_set_err((tg), __FILE__, __LINE__, __func__, (errno_code), __VA_ARGS__)
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
core/sc_vi.c:74:14: note: in expansion of macro 'sc_set_err'
   74 |       return sc_set_err(tg, EINVAL, "ERROR: %s: Set strip_fcs=%"PRId64", but interface"
      |              ^~~~~~~~~~
core/sc_vi.c:73:7: note: call to 'free' here
   73 |       free(vi_group);
      |       ^~~~~~~~~~~~~~