BUG: Update OpenIGTLinkIF to include UnpackIGTLMessage fix

$ git shortlog c45030e..bfe21de --no-merges
Jean-Christophe Fillion-Robin (2):
COMP: vtkIGTLToMRMLBase: Fix unused variable warnings
COMP: vtkMRMLIGTLConnectorNode: Fix sign-compare warning

Longquan Chen (2):
EHN: UnpackIGTLMessage needs to be performed if the IGTLToMRML is called from outside projects. otherwize, the InImageMessage is not initialized and causes an invalid memory access bug,
ENN: removed unused variable, refer to ISSUE#62

git-svn-id: http://svn.slicer.org/Slicer4/trunk@25815 3bd1e089-480b-0410-8dfb-8563597acbee