Fix crash when indexHint() is used

[novikd]

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Fix crash when indexHint function is used without arguments in the filters.

[robot-clickhouse-ci-2]

This is an automated comment for commit 728276a with description of existing statuses. It's updated for the latest CI running

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Successful checks

Check name	Description	Status
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Check name	Description	Status
Bugfix validate check	Checks that either a new test (functional or integration) or there some changed tests that fail with the binary built on master branch	❌ error
Integration tests	The integration tests report. In parenthesis the package type is given, and in square brackets are the optional part/total tests	❌ failure
Stateless tests	Runs stateless functional tests for ClickHouse binaries built in various configurations -- release, debug, with sanitizers, etc	❌ failure

[alexey-milovidov]

But the test does not demonstrate the crash.

[novikd]

@alexey-milovidov It fails for several CH version, but I don't know why Bugfix validate check is red.
https://fiddle.clickhouse.com/2cd35c9c-6e31-4180-becb-85a7cf1dcf9d