fixed some issues with WriteOutput channel initializations
fixed some issues with WriteOutput channel initializations

git-svn-id: https://windsvn2.nrel.gov/WT_Perf/branches/v4.x@136 a6739609-9c9d-4a29-a9ec-bdd8708b3f03

Former-commit-id: bc882a98f442c8e52efb1b05d02a9ba2d963c5ea
OpenFAST/OpenFAST,OpenFAST/OpenFAST,OpenFAST/OpenFAST