additional value check for comma-delimited 'empty' lines in samplesheet

illumina.py

@@ -528,7 +528,7 @@ def _detect_and_load_sheet(self, infile):
                         row['row_num'] = str(row_num)
                         if (self.only_lane is not None and row.get('lane') and self.only_lane != row['lane']):
                             continue
-                        if row['sample'] and row['barcode_1']:
+                        if ('sample' in row and row['sample']) and ('barcode_1' in row and row['barcode_1']):
                             self.rows.append(row)
             # go back and re-shuffle miseq columns if use_sample_name applies
             if (self.use_sample_name and 'sample_name' in header and all(row.get('sample_name') for row in self.rows)):