Use the right tx and ty definition in TrackCheckerHistos.cpp

The definition of tx and ty are corrected in checker/tracking/src/TrackCheckerHistos.cpp (the two were switched before).

FYI @dovombru

assigned to @fsouzade

Hi @fsouzade, the MR implements a minor bug fix, I don't know if it's actually necessary to test it or not.

added ci-test-triggered label

added RTA label

• [2022-04-13 18:14] Validation started with lhcb-master-mr#4231

assigned to @rmatev

added bug fix label

mentioned in issue Moore#421 (closed)

assigned to @thboettc and unassigned @fsouzade

added hlt1-throughput-decreased label

removed hlt1-throughput-decreased label

resolved all threads

added MC checking label

approved this merge request

merged

mentioned in commit cc4d4dd2

mentioned in issue Moore#426 (closed)