Primers should not be required for CellRangerVDJWrapper

Author: bbimber

singlecell/src/org/labkey/singlecell/run/CellRangerVDJWrapper.java

@@ -359,7 +359,10 @@ public AlignmentStep.AlignmentOutput performAlignment(Readset rs, List<File> inp
             {
                 writer.println("[vdj]");
                 writer.println("reference," + indexDir.getPath());
-                writer.println("inner-enrichment-primers," + primerFile);
+                if (primers != null)
+                {
+                    writer.println("inner-enrichment-primers," + primerFile);
+                }
                 writer.println("");
                 writer.println("[libraries]");
                 writer.println("fastq_id,fastqs,lanes,feature_types,subsample_rate");