readline: Make the parameter of VcpFunc be nullable

Fixes bug 667893.

diff --git a/vapi/readline.vapi b/vapi/readline.vapi
index e130fef8a9ef805276233bcc7150090b33d886af..6ff09fd43e4b232b6e6f9e9a6d5a0dbdd200eb87 100644 (file)
--- a/vapi/readline.vapi
+++ b/vapi/readline.vapi
@@ -54,7 +54,7 @@ namespace Readline {
        [CCode (cname = "rl_vintfunc_t", has_target = false)]
        public delegate void     VintFunc (int a);
        [CCode (cname = "rl_vcpfunc_t", has_target = false)]
-       public delegate void     VcpFunc (string s);
+       public delegate void     VcpFunc (string? s);
        [CCode (cname = "rl_vcppfunc_t", has_target = false)]
        public delegate void     VcppFunc (string[] s);
        [CCode (cname = "rl_cpvfunc_t", has_target = false)]