Fix invalid charPositionInLine reported for the 1s line tokens

Reported here:
http://antlr.markmail.org/search/?q=Jim%20Idle#query:Jim%20Idle%20from%20list%3Aorg.antlr.antlr-interest%20from%3A%22Jim%20Idle%22+page:83+mid:rnvmkdec65rddzua+state:results
Fix ST compile warning - Java target used as an example