When |allow_partial| is true, only when the number of channels of a
given DataType is the same for both bundles are the corresponding
channels connected together.
When |allow_partial| is false (the default), the number of channels must
match for each DataType (the ChanCounts must be equal) for the
connection to be attempted.
This also fixes the logic in case two bundles have the same number of
channels, or even the same ChanCounts, but not with the DataTypes in the
same order (so connecting the ith channel of the bundle to the ith
channel of the other bundle makes no sense).
8cb40ab25b