Add more warnings

libcrystfel/src/index.c

@@ -583,6 +583,8 @@ static int check_cell(IndexingFlags flags, Crystal *cr, UnitCell *target,
 	/* Check at all? */
 	if ( !(flags & INDEXING_CHECK_CELL) ) return 0;
 
+	if ( !right_handed(target) ) STATUS("WARNING: reference cell is left handed\n");
+	if ( !right_handed(crystal_get_cell(cr)) ) STATUS("WARNING: unmatched cell is left handed\n");
 	out = compare_reindexed_cell_parameters(crystal_get_cell(cr), target,
 	                                       tolerance, &rm);