deinit

pub fn deinit(self: *Pdb) void {
    self.in_file.close();
    self.msf.deinit(self.allocator);
    for (self.modules) |*module| {
        module.deinit(self.allocator);
    }
    self.allocator.free(self.modules);
    self.allocator.free(self.sect_contribs);
}