Fix #37194, OSL script crashes blender. The lookup functions for finding Cycles shader inputs/outputs based on socket names are using a few modifications on the Blender socket names. But these only apply
to standard nodes where the Blender socket names can differ from associated Cycles names and may require additional indices to make them unique. Script node sockets are already unique and exact due to
being generated from the script function parameters.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@61008 954f8c5b-7b00-dc11-b283-0030488c597c