Tests: Clang bug workaround: print index on failure
Tests: Clang bug workaround: print index on failure

Clang unconditionally fails one of the COMPAREs and prints values that
clearly show a passing test. Even though the values compared are
completely bogus. Printing the j index on failure makes the test pass.
Currently, I don't have enough time & energy to reduce the issue for a
prober clang bug report.

Signed-off-by: Matthias Kretz <372ea4eca737a13cd010ee806d4ce7b98ee71550@kde.org>

chr-engwer/Vc,VcDevel/Vc,VcDevel/Vc,chr-engwer/Vc,VcDevel/Vc,VcDevel/Vc,chr-engwer/Vc