plotTracks: wrong sign in 'by' argument

[lgatto]

Since commit 08c8b11, the vignette fails in chunk complex-plot (lines 187 - 190) with the following error:

> pt <- ProbeTrack(sequence = restab$peptide, intensity = restab$group2, probeStart = restab$start, cex=0, legend=TRUE)
> plotTracks(trackList=c(pat, st, at, pt, ctM), from=460, to=560, type="l")
Error in seq.default((minBase + 0.5), length(sequence) - 1 + 0.5, by = 1) (from GenericsAndMethods.R#316) : wrong sign in 'by' argument
> traceback()
7: stop("wrong sign in 'by' argument")
6: seq.default((minBase + 0.5), length(sequence) - 1 + 0.5, by = 1)
5: seq((minBase + 0.5), length(sequence) - 1 + 0.5, by = 1) at GenericsAndMethods.R#316
4: .local(GdObject, ...)
3: drawGD(expandedTrackList[[i]], minBase = ranges["from"], maxBase = ranges["to"], subset = FALSE)
2: drawGD(expandedTrackList[[i]], minBase = ranges["from"], maxBase = ranges["to"], subset = FALSE)
1: plotTracks(trackList = c(pat, st, at, pt, ctM), from = 460, to = 560, type = "l")

[SRenan]

Thank you for testing and reporting.
The package needs some automatic testing. I will definitely add tests for all Tracks when I get some time.