Make Fadd_face_text_property even less destructive

* src/textprop.c (Fadd_face_text_property): We need to be
non-destructive in buffers, too, because face properties may have
been added with `put-text-property' as a list that's been reused.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/textprop.c b/src/textprop.c
index 13cd87ac473..93d19754da5 100644
--- a/src/textprop.c
+++ b/src/textprop.c
@@ -1351,7 +1351,7 @@ into it.  */)
                          (NILP (append)
                           ? TEXT_PROPERTY_PREPEND
                           : TEXT_PROPERTY_APPEND),
-                         !STRINGP (object));
+                         false);
   return Qnil;
 }