#1160 buckshot data in LanlNNRebinner can still be mistaken.

[Jeremy Faden]

The LanlNNRebinner has new support for buckshot data (X[t],Y[t],Z[t]). This branch was misfiring because the code that detects the buckshot data saw the bundle and tried to use it as well.

http://www.rbsp-ect.lanl.gov/data_pub/rbspa/rept/level3/rbspa_rel02_ect-rept-sci-L3_20130915_v4.0.0.cdf?FEDU

This is corrected by checking that there are only three bundled datasets, but this could happen for other sources.

Something like:

Z= ripples(3,3)
X= linspace(0,10,3)
Y= linspace(0,10,3)
bds= new bundle descriptor for the three datasets
Y= putProperty( Y, QDataSet.BUNDLE_1, bds )
Z= link( X, Y, Z )