Merge pull request #2423 from Benglin/RC0.7.2_master

Change GCRetain() and GCRelease() order
Fix to handle longest lacing on empty arrays

It used to crash, it now doesn't execute the function

http://adsk-oss.myjetbrains.com/youtrack/issue/MAGN-4566
Merge pull request #2439 from junmendoza/RC0.7.2_master

Fix to handle longest lacing on empty arrays
Increase reference count for array elements