Fixed a slice detection bug when the starting angle was less than -2*pi. Fixed issue 387.
Fixed a slice detection bug when the starting angle was less than -2*pi. Fixed issue 387.

kamalvenkat/core-plot,tectronics/core-plot,zenXian/core-plot,divyavamsee/core-plot,LiDechao/core-plot,eoinnorris/core-plot,LiDechao/core-plot,zenXian/core-plot,sureshdustrise/core-plot,eoinnorris/core-plot,divyavamsee/core-plot,sureshdustrise/core-plot,kamalvenkat/core-plot,kamalvenkat/core-plot,sureshdustrise/core-plot,sureshdustrise/core-plot,eoinnorris/core-plot,eoinnorris/core-plot,divyavamsee/core-plot,zenXian/core-plot,zenXian/core-plot,tectronics/core-plot,LiDechao/core-plot,kamalvenkat/core-plot,tectronics/core-plot,divyavamsee/core-plot,tectronics/core-plot,LiDechao/core-plot