BLD: typo

Author: mattip

travis-ci/build_steps.sh

@@ -33,7 +33,7 @@ function build_lib {
     #     MB_ML_VER
     set -x
     local plat=${1:-$PLAT}
-    local manylinux=${1:-$MB_ML_VER}
+    local manylinux=${MB_ML_VER:-1}
     # Make directory to store built archive
     if [ -n "$IS_OSX" ]; then
         # Do build, add gfortran hash to end of name