perf timechart: Fix task row type narrowing in goto_task()

Mypy cannot narrow Row to TaskRow or IoRow when the class passed to
isinstance() comes from a loop variable, causing the perf build to fail
with:

  python/ttimechart.py:1686: error: "Row" has no attribute "task" [attr-defined]

Check against TaskRow and IoRow explicitly so mypy can verify access to
the task attribute. The tasks and I/O views contain TaskRow and IoRow
instances respectively, so task navigation behaves as before.

Fixes: e7a72d6919804e5e ("perf timechart: Add an interactive --tui mode")
Reviewed-by: Ian Rogers <irogers@google.com>
Assisted-by: Codex:GPT-6.1-Sol
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Alice Rogers <alice.mei.rogers@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

0 files changed, 0 insertions, 0 deletions