removed bug in atom radical electron checking
removed bug in atom radical electron checking

return False whenever we found that the number of unpaired electrons
of the molecule atom cannot be found in the list of unpaired electrons of
the group atom.

enochd/RMG-Py,enochd/RMG-Py,pierrelb/RMG-Py,comocheng/RMG-Py,nyee/RMG-Py,nyee/RMG-Py,nickvandewiele/RMG-Py,chatelak/RMG-Py,pierrelb/RMG-Py,nickvandewiele/RMG-Py,comocheng/RMG-Py,chatelak/RMG-Py