Changes related to correctly defining the reference chip for WFPC2 subarrays (problems reported from pipeline testing
Changes related to correctly defining the reference chip for WFPC2 subarrays (problems reported from pipeline testing

git-svn-id: e4aa3cfa51ba591d1cd1dbbaf7e4a2c2b5d7a7ff@1203 fe389314-cf27-0410-b35b-8c050e845b92

spacetelescope/stsci.tools