Bugfix: sub function not handling lazy strings.

This bug means that range indexing doesn't work on
lazy strings. Ouch!

* lib.c (sub): Added missing LSTR switch case.

1 files changed, 1 insertions, 0 deletions

diff --git a/lib.c b/lib.c
index b3657a60..671e13ac 100644
--- a/lib.c
+++ b/lib.c
@@ -6769,6 +6769,7 @@ val sub(val seq, val from, val to)
     return sub_list(seq, from, to);
   case LIT:
   case STR:
+  case LSTR:
     return sub_str(seq, from, to);
   case VEC:
     return sub_vec(seq, from, to);