#881 --partialcharge gasteiger fail for protein from pdb

[ProzacR]

$ wget http://www.pdb.org/pdb/files/2BOH.pdb && wget http://www.pdb.org/pdb/files/2HOC.pdb
$ babel --partialcharge gasteiger 2HOC.pdb 2HOC.mol2
0 molecules converted
20 audit log messages
$ babel --partialcharge gasteiger 2BOH.pdb 2BOH.mol2
0 molecules converted
20 audit log messages
etc.