Row selection in results throws NPE

[Alexander Pico]

Selecting a row in the results of the Enrichment Table should select the genes in the network corresponding to the "intersecting genes" in that row.

Currently, an NPE is thrown:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at org.nrnb.gsoc.enrichment.ui.EnrichmentCytoPanel.valueChanged(EnrichmentCytoPanel.java:459)