Fix misleading indentation

[dveeden]

dbdimp.c: In function ‘mariadb_db_login6_sv’:
dbdimp.c:2675:3: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
 2675 |   if (!mariadb_db_my_login(aTHX_ dbh, imp_dbh))
      |   ^~
In file included from dbdimp.h:42,
                 from dbdimp.c:16:
/usr/lib64/perl5/vendor_perl/auto/DBI/DBIXS.h:324:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
  324 |     do {                                                                \
      |     ^~
dbdimp.c:2681:5: note: in expansion of macro ‘DBIc_ACTIVE_on’
 2681 |     DBIc_ACTIVE_on(imp_dbh);
      |     ^~~~~~~~~~~~~~

[choroba]

The failed tests are caused by GitHub's infrastructure problems. I'll try to rerun them once GitHub gets stable.

[dveeden]

@choroba did you re-run them?

[choroba]

GH Action tests are all green now. FreeBSD has problems, but that's because our tests need to move to a more recent version.

[choroba]

Once the fix to the FreeBSD tests is merged, we need to rebase this PR's branch to it and the tests will run.

[choroba]

FreeBSD tests should be ready.

[dveeden]

I've rebased my commit on master