Fixed typing problems for get_index_for_base() that turned up (during testing) on

the Itanium cluster at NCSA (thanks Mark Straka). JM


git-svn-id: https://svn-wrf-model.cgd.ucar.edu/trunk@114 b0b5d27b-6f0f-0410-a2a3-cb1e977edc3d