patch 8.2.3530: ":buf \{a}" fails while ":edit \{a}" works

Problem:    ":buf \{a}" fails while ":edit \{a}" works.
Solution:   Unescape "\{". (closes #8917)
diff --git a/src/terminal.c b/src/terminal.c
index cabcf9d..e9dd8ea 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -667,7 +667,7 @@
 
 	    if (s == NULL)
 		break;
-	    p = vim_strsave_fnameescape(s, FALSE);
+	    p = vim_strsave_fnameescape(s, VSE_NONE);
 	    if (p == NULL)
 		break;
 	    ga_concat(&ga, p);