There are now two line implementations: LICE_Line(ints) and LICE_FLine(floats). This is a performance improvement in the case where your input points are all integers. I should mention, the float version is not hugely tested for corner cases (antialiasing at the top edge of a bitmap, for example).
That makes sense, great news! Btw. after playing around with Juce for a while, I'm back to using IPlug, and having learned enough C++ in the meantime to figure out how to do some stuff that I couldn't initially, I must say it's a pleasure to use :)