initialized error status values in AirfoilInfo.
initialized error status values in AirfoilInfo.

git-svn-id: https://windsvn2.nrel.gov/WT_Perf/branches/v4.x@77 a6739609-9c9d-4a29-a9ec-bdd8708b3f03

Former-commit-id: 7f6a7e53fe08f21496fd5a4a8c89ac6e7cf439f3
OpenFAST/OpenFAST,OpenFAST/OpenFAST,OpenFAST/OpenFAST