Fix an assertion

* src/dispnew.c (clear_glyph_matrix_rows): Test matrix->nrows == 0 (which implies start == 0) separately.
2016-02-25 09:34:55 +08:00
parent 040e0d6b3b
commit 8be32cf45c
1 changed files with 3 additions and 1 deletions
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -683,7 +683,9 @@ void
 clear_glyph_matrix_rows (struct glyph_matrix *matrix, int start, int end)
 {
  eassert (start <= end);
-  eassert (start >= 0 && start <= matrix->nrows);
+  eassert (start >= 0 && (start < matrix->nrows
+			  /* matrix->nrows can be 0 for the initial frame.  */
+			  || (matrix->nrows == 0)));
  eassert (end >= 0 && end <= matrix->nrows);

  for (; start < end; ++start)