patch 8.2.3476: renaming a buffer on startup may cause using freed memory

Problem:    Renaming a buffer on startup may cause using freed memory.
Solution:   Check if the buffer is used in a window. (closes #8955)

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3476,
 /**/
     3475,
 /**/