Introduced in previous commit:

../src/misc.c: In function ‘fork_exec’:
../src/misc.c:184:9: warning: assignment to ‘GError *’ {aka ‘struct _GError *’} from ‘gboolean’ {aka ‘int’} makes pointer from integer without a cast [-Wint-conversion]
  184 |     err = g_shell_parse_argv(ex, &argc, &argv, &err);
      |         ^
../src/misc.c:173:14: warning: unused variable ‘ret’ [-Wunused-variable]
  173 |     gboolean ret;
      |              ^~~

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>