Fix the problem with disabling bi-predictive IBC macro for AE0078 and AE0159

Hong-Jheng Jhurequested to merge
Ted/ECM:FIX_AE0078_AE0159 into master

Fix the problem with disabling bi-predictive IBC macro for AE0078 and AE0159

The MR contains fix for encoder crashes related to Issue #52 (closed).

Tests were done by turning off the other reported problematic macros in Issue #52 (closed).

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