Bug fix (introduced in version 2.4) to D3 dispersion energy.
This bug shows up for atoms with extreme coordination numbers.
Bug fix will be back ported to version 2.4 and 2.5 branches. 


git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@13817 bac0169d-1eea-4375-b5f6-f89d2ced9994