master 703f29d541: Ensure no memory leaks of glyph_matrix

[Eli Zaretskii]

branch: master
commit 703f29d541e099c9f43b1b2877846e12098e7361
Author: Manuel Giraud <manuel@ledu-giraud.fr>
Commit: Eli Zaretskii <eliz@gnu.org>

    Ensure no memory leaks of glyph_matrix
    
    ; * src/dispnew.c (allocate_matrices_for_window_redisplay): Allocate
    each glyph_matrix only when it's NULL.  (Bug#58028)
---
 src/dispnew.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/dispnew.c b/src/dispnew.c
index b786f0f1ba..2568ba1086 100644
--- a/src/dispnew.c
+++ b/src/dispnew.c
@@ -1810,9 +1810,12 @@ allocate_matrices_for_window_redisplay (struct window *w)
          if (w->desired_matrix == NULL)
            {
              w->desired_matrix = new_glyph_matrix (NULL);
-             w->current_matrix = new_glyph_matrix (NULL);
+             eassert (w->current_matrix == NULL);
            }
 
+         if (w->current_matrix == NULL)
+           w->current_matrix = new_glyph_matrix (NULL);
+
          dim.width = required_matrix_width (w);
          dim.height = required_matrix_height (w);
          adjust_glyph_matrix (w, w->desired_matrix, 0, 0, dim);