[vala/staging] bzlib: Add bzalloc/bzfree fields to Stream

[Rico Tzschichholz <ricotz src gnome org>]

commit c3621d0f74783f29f4b58c2eb5d338dabf9428df
Author: Jakub Kaszycki <kuba kaszycki net pl>
Date:   Fri Mar 16 21:16:00 2018 +0100

    bzlib: Add bzalloc/bzfree fields to Stream
    
    https://bugzilla.gnome.org/show_bug.cgi?id=794409

 vapi/bzlib.vapi |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/vapi/bzlib.vapi b/vapi/bzlib.vapi
index 844442d..e75c10a 100644
--- a/vapi/bzlib.vapi
+++ b/vapi/bzlib.vapi
@@ -57,6 +57,8 @@ namespace BZLib {
                public uint totoal_out_lo32;
                public uint total_out_hi32;
                public void *state;
+               public AllocFunc? bzalloc;
+               public FreeFunc? bzfree;
                public void *opaque;
                [CCode (cname = "BZ2_bzCompressInit")]
                public Status compress_init (int block_size_100k, int verbosity, int work_factor);
@@ -81,4 +83,10 @@ namespace BZLib {
                public int write (uint8[] buf);
                public unowned string error (out Status status);
        }
+
+       [CCode (has_target = false, has_typedef = false)]
+       public delegate void* AllocFunc (void* target, int m, int n);
+
+       [CCode (has_target = false, has_typedef = false)]
+       public delegate void FreeFunc (void* target, void* p);
 }