Merge "Revert "Fix memory/resource handling in imgdiff.cpp, using unique_ptr and vector.""
am: c96c9881a6

* commit 'c96c9881a628caea9cc88d1c1fbf4d2988999712':
  Revert "Fix memory/resource handling in imgdiff.cpp, using unique_ptr and vector."

Change-Id: Ie4f6b07f8526232b77e240fff37d73b3e35642cd