Avoid a potentially undefined left-shift in the fts5 porter tokenizer.
FossilOrigin-Name: 46a288e43e4c48fca6610bce6a2db418aaa3c8a1dcb115b7a0bfad2063355e58
D
dan committed
ec2ea68d1f2b39d86e401cc37992de1d00e1cfaf
Parent: c71e6dd