ripple/ripple-lib — pull request #18 by mjethani (2013-10-05 03:23:14+00:00)
Title: Fixed issue with parsing of trade price.

The + operator has higher precedence, which causes the price to be read
as '' (empty string) no matter what the currency and issuer.

I believe this will fix the "Last price = n/a" error in the default
client as well.