piecharts.py: eliminate wedge line for 360deg slice
piecharts.py: eliminate wedge line for 360deg slice

Distrotech/reportlab,kanarelo/reportlab,Distrotech/reportlab,kanarelo/reportlab,kanarelo/reportlab,kanarelo/reportlab,kanarelo/reportlab,Distrotech/reportlab,Distrotech/reportlab,Distrotech/reportlab