History slider has bad range

[saulrh]

There are a few things that will cause GRIP to spit out an endless stream of "IA__gtk_range_set_range: assertion `min < max' failed" messages. I think that I've figured out the cause - the internet says that this error is thrown by slider controls. Given the strict less-than there, I suspect that the slider's initial state - [0,0] - might be violating this assertion and causing the message. Is there a way to initialize history or the history slider such that this isn't the case?