(mirror_line_dance): Set W2 according to FRAME_FROM.

diff --git a/src/dispnew.c b/src/dispnew.c
index 63a8a3a313f67c9ff9cdccde391db3ba96a94182..5ffd1a2ce58e39f7b92fdf8c1834a7eb226037cb 100644 (file)
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -3164,7 +3164,7 @@ mirror_line_dance (w, unchanged_at_top, nlines, copy_from, retained_p)
                  struct glyph_matrix *m2;
                  int m2_from;
 
-                 w2 = frame_row_to_window (root, frame_to);
+                 w2 = frame_row_to_window (root, frame_from);
                  m2 = w2->current_matrix;
                  m2_from = frame_from - m2->matrix_y;
                  copy_row_except_pointers (m->rows + window_to,