Division by zero error in pacgraph-tk for packages with no dependencies

[arunisaac]

Consider a package with no dependencies, say tzdata.

When I run

pacgraph-tk tzdata

I get the following error message:

Loading repository.
warning: cron found in ['cronie', 'fcron'], assuming cronie
warning: netcat found in ['gnu-netcat', 'openbsd-netcat'], assuming gnu-netcat
warning: ttf-font found in ['ttf-bitstream-vera', 'ttf-dejavu', 'ttf-droid', 'ttf-freefont', 'ttf-liberation', 'ttf-linux-libertine', 'ttf-ubuntu-font-family'], assuming ttf-bitstream-vera
warning: d-runtime found in ['libgphobos-devel', 'liblphobos-devel', 'libphobos-devel'], assuming libgphobos-devel
warning: d-compiler found in ['dmd', 'gdc', 'ldc'], assuming dmd
warning: dhcp-client found in ['dhclient', 'dhcpcd'], assuming dhclient
warning: smtp-server found in ['exim', 'opensmtpd', 'postfix'], assuming exim
warning: smtp-forwarder found in ['esmtp', 'exim', 'msmtp-mta', 'nullmailer', 'opensmtpd', 'postfix', 'ssmtp'], assuming esmtp
warning: libreoffice-langpack found in ['libreoffice-af', 'libreoffice-am', 'libreoffice-ar', 'libreoffice-as', 'libreoffice-ast', 'libreoffice-be', 'libreoffice-bg', 'libreoffice-bn', 'libreoffice-bn-IN', 'libreoffice-bo', 'libreoffice-br', 'libreoffice-brx', 'libreoffice-bs', 'libreoffice-ca', 'libreoffice-ca-XV', 'libreoffice-cs', 'libreoffice-cy', 'libreoffice-da', 'libreoffice-de', 'libreoffice-dgo', 'libreoffice-dz', 'libreoffice-el', 'libreoffice-en-GB', 'libreoffice-en-US', 'libreoffice-en-ZA', 'libreoffice-eo', 'libreoffice-es', 'libreoffice-et', 'libreoffice-eu', 'libreoffice-fa', 'libreoffice-fi', 'libreoffice-fr', 'libreoffice-ga', 'libreoffice-gd', 'libreoffice-gl', 'libreoffice-gu', 'libreoffice-he', 'libreoffice-hi', 'libreoffice-hr', 'libreoffice-hu', 'libreoffice-id', 'libreoffice-is', 'libreoffice-it', 'libreoffice-ja', 'libreoffice-ka', 'libreoffice-kk', 'libreoffice-km', 'libreoffice-kn', 'libreoffice-ko', 'libreoffice-kok', 'libreoffice-ks', 'libreoffice-ku', 'libreoffice-lb', 'libreoffice-lo', 'libreoffice-lt', 'libreoffice-lv', 'libreoffice-mai', 'libreoffice-mk', 'libreoffice-ml', 'libreoffice-mn', 'libreoffice-mni', 'libreoffice-mr', 'libreoffice-my', 'libreoffice-nb', 'libreoffice-ne', 'libreoffice-nl', 'libreoffice-nn', 'libreoffice-nso', 'libreoffice-oc', 'libreoffice-om', 'libreoffice-or', 'libreoffice-pa-IN', 'libreoffice-pl', 'libreoffice-pt', 'libreoffice-pt-BR', 'libreoffice-ro', 'libreoffice-ru', 'libreoffice-rw', 'libreoffice-sa-IN', 'libreoffice-sat', 'libreoffice-sd', 'libreoffice-sh', 'libreoffice-si', 'libreoffice-sid', 'libreoffice-sk', 'libreoffice-sl', 'libreoffice-sq', 'libreoffice-sr', 'libreoffice-ss', 'libreoffice-st', 'libreoffice-sv', 'libreoffice-sw-TZ', 'libreoffice-ta', 'libreoffice-te', 'libreoffice-tg', 'libreoffice-th', 'libreoffice-tn', 'libreoffice-tr', 'libreoffice-ts', 'libreoffice-tt', 'libreoffice-ug', 'libreoffice-uk', 'libreoffice-uz', 'libreoffice-ve', 'libreoffice-vi', 'libreoffice-xh', 'libreoffice-zh-CN', 'libreoffice-zh-TW', 'libreoffice-zu'], assuming libreoffice-af
warning: phonon-backend found in ['phonon-gstreamer', 'phonon-vlc'], assuming phonon-gstreamer
Preparing 1 nodes.
Traceback (most recent call last):
  File "/usr/bin/pacgraph-tk", line 223, in <module>
    main()
  File "/usr/bin/pacgraph-tk", line 196, in main
    tree = pacgraph.pt_sizes(tree, 10, 100)
  File "/usr/bin/pacgraph", line 599, in pt_sizes
    tree[p].font_pt = convert(node.size)
  File "/usr/bin/pacgraph", line 597, in <lambda>
    convert = lambda s: int((max_pt-min_pt)*(s-min_s)/(max_s-min_s) + min_pt)
ZeroDivisionError: division by zero

There seems to be a division by zero error in the function converting package size to font pt.