Bug#919742: orthanc-wsi FTBFS 'class GlobalDcmDataDictionary' has no member named 'unlock'

[peter green]

Package: orthanc-wsi
Severity: serious
Version: 0.5-2

orthanc-wsi fails to build in unstable, I presume this was triggered by the 
dcmtk transition.

https://buildd.debian.org/status/fetch.php?pkg=orthanc-wsi&arch=amd64&ver=0.5-2%2Bb3&stamp=1547409452&raw=0

/<<PKGBUILDDIR>>/BuildApplications/Orthanc-1.3.2/Core/DicomParsing/FromDcmtkBridge.cpp:188:21:
 error: 'class GlobalDcmDataDictionary' has no member named 'unlock'; did you mean 'rdlock'?
          dcmDataDict.unlock();