libsepol: do not leak memory when an error occurs

name_list_to_string() and constraint_expr_to_string() both define an
exit label to clean-up dynamically-allocated memory when an error
occurs, but they miss some variables. Free the missing ones too.

This issue has been found using clang's static analyzer.

Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
1 file changed