fixed bug in run-time lexer engine when backtracking is enabled but lexer rule did not invoke reject() and did not 'return' a valid token ID: then the rule should be exactly like in the regular lexer: no further rules should be tested and the lexer should simply return false in order for the next bit of input to be lexed. (This happens, for instance, when skipping over whitespace in a backtracking lexer.)
Merge branch 'master' of github.com:GerHobbelt/jison