Avoid NPE

Author: bbimber

SequenceAnalysis/src/org/labkey/sequenceanalysis/SequenceAnalysisMaintenanceTask.java

@@ -398,6 +398,12 @@ private void processContainer(Container c, Logger log) throws IOException
                 ExpData d = ExperimentService.get().getExpData(dataId);
                 if (d != null)
                 {
+                    if (d.getFile() == null)
+                    {
+                        log.error("File was null for ExpData: " + d.getRowId());
+                        continue;
+                    }
+
                     expectedFileNames.add(d.getFile().getName());
                     expectedFileNames.addAll(getAssociatedFiles(d.getFile(), true));