merge from bioc

git-svn-id: https://hedgehog.fhcrc.org/bioconductor/branches/RELEASE_2_14/madman/Rpacks/flowStats@90414 bc3139a8-67e5-0310-9ffc-ced21a209358
fix the plotting bug introduced by RGLab/flowCore#23
Merge branch 'trunk'
Merge commit '6a869a94a1a4dc8779256ac78189b175b1820261'