fix UBSAN error in libnabo for maxNodeCount

* noticed by BDR
* nb 0x1ULL would also have been appropriate by ULL is C++11 specific
  and the value can only be shifted up to 31 places (32 is not poss
  because dimBitCount>=1 if dim >=1
Merge branch 'fix/ubsan'

* fix/ubsan:
  fix UBSAN error in libnabo for maxNodeCount
* closes #1
Add BugReports URL
Bump version to 0.4.3