Guard against error states.
Guard against error states.

If we get into an error state, we can get INT_MAX for log_length.
This either comes about because a driver is braindead or log_length
happens to take that value because it was uninitialized; however it
comes about, a gigantic value causes the vector initialization to
take forever.


git-svn-id: 83c4c97093aeea62ac982fbfd516bf9db27f5c99@1737 c36c8488-0289-0348-9b64-b301f74bd9a7

BlueBrain/Tuvok,BlueBrain/Tuvok,BlueBrain/Tuvok