simplified chain.v4p
Fixed null pointer exception introduced by a4d6722e0b4d16db5637fdcf9c32fdd94219d0e4
Fixed unnecessary rebuild of dynamic assembly.

When looking up assembly candidates for a dynamic plugin the query chose the oldest instead of the newest assembly.
The method IsAssemblyUpToDate should less likely crash. See http://vvvv.org/forum/error-when-saving-in-code-editor

Root cause to reproduce described issue is not solved by this commit.