[pango/wip/baedert/for-master: 52/53] pango-tabs: Avoid passing NULL to memcpy

[Timm Bäder <baedert src gnome org>]

commit 29674a51c0cd9a41e323fe7e3473ca327b79c3f4
Author: Timm Bäder <mail baedert org>
Date:   Wed Jun 10 05:54:27 2020 +0200

    pango-tabs: Avoid passing NULL to memcpy
    
    pango_tab_array_new might not actually allocate anything for ->tabs.

 pango/pango-tabs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/pango/pango-tabs.c b/pango/pango-tabs.c
index 1ffa8356..56a34468 100644
--- a/pango/pango-tabs.c
+++ b/pango/pango-tabs.c
@@ -192,7 +192,8 @@ pango_tab_array_copy (PangoTabArray *src)
 
   copy = pango_tab_array_new (src->size, src->positions_in_pixels);
 
-  memcpy (copy->tabs, src->tabs, sizeof(PangoTab)*src->size);
+  if (copy->tabs)
+    memcpy (copy->tabs, src->tabs, sizeof(PangoTab) * src->size);
 
   return copy;
 }