RFR: JDK-8279533 Bad indentation and missing curly braces in BlockBegin::set_end

[Ludvig Janiuk]

Fixed this to please SonarCloud, but it was already working as intended. This change is equivalent with the original code.

-------------

Commit messages:
 - JDK-8279533 Bad indentation and missing curly braces in BlockBegin::set_end

Changes: https://git.openjdk.java.net/jdk/pull/6972/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6972&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279533
  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6972.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6972/head:pull/6972

PR: https://git.openjdk.java.net/jdk/pull/6972