Error when the registry contains multiple empty lines

[ralf57]

If /usr/local/packager/registry.log contains 2 or more empty lines the following error happens:

Traceback (most recent call last):
  File "/usr/local/packager/packager.py", line 561, in <module>
    c.run()
  File "/usr/local/packager/packager.py", line 50, in run
    cmd_obj.run(self, params, options)
  File "/usr/local/packager/packager.py", line 153, in run
    registry = PackageRegistry()
  File "/usr/local/packager/packager.py", line 439, in __init__
    self.packages = self.__parseRegistry(self.__registry)
  File "/usr/local/packager/packager.py", line 451, in __parseRegistry
    package, version = line.split(':')
ValueError: need more than 1 value to unpack

OSX 10.13.2
Python 2.7.10