Version 2.2: bug fix release
1. Matcher.java: change def of Erroroutput to match e.g. ERROROUTPUT
2. InputVariable: get() change input->line
3. VarMap.write: forgot the case where we are assigning to
   a previously assigned value.
4. Matcher.java: case PC_Setcur: conflating Vars != null
   with debug output; separate out; this affected test 5b.
Note: all these were found by Ed Clark (eaclark@ameritech.net).