telepathy-gabble: Fix allocation of the string passed to g_base64_encode_step.

[Will Thompson]

Module: telepathy-gabble
Branch: master
Commit: eae50abaec48f182b9cbe4cd2d0882f20c04be65
URL:    http://cgit.freedesktop.org/telepathy/telepathy-gabble/commit/?id=eae50abaec48f182b9cbe4cd2d0882f20c04be65

Author: Alban Browaeys <prahal at yahoo.com>
Date:   Tue Nov 13 18:49:17 2012 +0100

Fix allocation of the string passed to g_base64_encode_step.

As per g_base64 documentation the minimum size is :
avatar->len / 3 + 1) *4 + 4)
and if line breaks are enabled:
+  ((avatar->len / 3 + 1) * 4 + 4) / 72 + 1

https://bugs.freedesktop.org/show_bug.cgi?id=57080

---

 src/conn-avatars.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/conn-avatars.c b/src/conn-avatars.c
index 31d3efc..34ca5f8 100644
--- a/src/conn-avatars.c
+++ b/src/conn-avatars.c
@@ -840,7 +840,7 @@ gabble_connection_set_avatar (TpSvcConnectionInterfaceAvatars *iface,
       gint state = 0, save = 0, outlen;
 
       ctx->avatar = g_string_new_len (avatar->data, avatar->len);
-      base64 = g_malloc ((avatar->len / 3 + 1) * 4 + 1);
+      base64 = g_malloc (((avatar->len / 3 + 1) *4 + 4) + ((avatar->len / 3 + 1) * 4 + 4) / 72 + 1);
       outlen = g_base64_encode_step ((const guchar *) avatar->data,
           avatar->len, TRUE, base64, &state, &save);
       outlen += g_base64_encode_close (TRUE, base64 + outlen, &state, &save);