Fixup scanf formats vs variables' types

[xemul]

https://www.codacy.com/app/xemul/criu/issues?bid=4795042&filters=W3siaWQiOiJMYW5ndWFnZSIsInZhbHVlcyI6W251bGxdfSx7ImlkIjoiQ2F0ZWdvcnkiLCJ2YWx1ZXMiOlsiQ29kZSBTdHlsZSJdfSx7ImlkIjoiTGV2ZWwiLCJ2YWx1ZXMiOltudWxsXX0seyJpZCI6IlBhdHRlcm4iLCJ2YWx1ZXMiOlsyMjM5XX0seyJpZCI6IkF1dGhvciIsInZhbHVlcyI6W251bGxdfSx7InZhbHVlcyI6W119XQ==

[github-actions]

A friendly reminder that this issue had no activity for 30 days.

[github-actions]

A friendly reminder that this issue had no activity for 30 days.

[mihalicyn]

https://app.codacy.com/gh/mihalicyn/criu/issues?&filters=W3siaWQiOiJMYW5ndWFnZSIsInZhbHVlcyI6W119LHsiaWQiOiJDYXRlZ29yeSIsInZhbHVlcyI6WyJFcnJvclByb25lIl19LHsiaWQiOiJMZXZlbCIsInZhbHVlcyI6W119LHsiaWQiOiJQYXR0ZXJuIiwidmFsdWVzIjpbIjIyMzkiXX0seyJpZCI6IkF1dGhvciIsInZhbHVlcyI6W119XQ==

[mihalicyn]

https://app.codacy.com/gh/mihalicyn/criu/issues?&filters=W3siaWQiOiJMYW5ndWFnZSIsInZhbHVlcyI6W119LHsiaWQiOiJDYXRlZ29yeSIsInZhbHVlcyI6WyJFcnJvclByb25lIl19LHsiaWQiOiJMZXZlbCIsInZhbHVlcyI6W119LHsiaWQiOiJQYXR0ZXJuIiwidmFsdWVzIjpbIjIxNTIiXX0seyJpZCI6IkF1dGhvciIsInZhbHVlcyI6W119XQ==

[mihalicyn]

https://app.codacy.com/gh/mihalicyn/criu/issues?&filters=W3siaWQiOiJMYW5ndWFnZSIsInZhbHVlcyI6W119LHsiaWQiOiJDYXRlZ29yeSIsInZhbHVlcyI6WyJFcnJvclByb25lIl19LHsiaWQiOiJMZXZlbCIsInZhbHVlcyI6W119LHsiaWQiOiJQYXR0ZXJuIiwidmFsdWVzIjpbIjIxODEiXX0seyJpZCI6IkF1dGhvciIsInZhbHVlcyI6W119XQ==