Fix sreport core dump.

src/sreport/job_reports.c

@@ -308,9 +308,10 @@ static int _set_cond(int *start, int argc, char *argv[],
 					 MAX(command_len, 2))) {
 			if (!strncasecmp(argv[i]+end, "individual", 1)) {
 				individual_grouping = 1;
-			} else if (grouping_list)
-				slurm_addto_char_list(grouping_list,
-						      argv[i]+end);
+				if (grouping_list)
+					slurm_addto_char_list(grouping_list,
+							      argv[i]+end);
+			}
 		} else if (!strncasecmp (argv[i], "Jobs",
 					 MAX(command_len, 1))) {
 			char *end_char = NULL, *start_char = argv[i]+end;
@@ -643,7 +644,9 @@ extern int job_sizes_grouped_by_top_acct(int argc, char *argv[])
 		goto end_it;
 	}
 
-	_setup_grouping_print_fields_list(grouping_list);
+	if (_setup_grouping_print_fields_list(grouping_list) != SLURM_SUCCESS) {
+		goto end_it;
+	}
 
 	if (print_fields_have_header) {
 		char start_char[20];