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pcu_sock: add some guard space to message buffer

in osmo-pcu, the message buffer in pcu_sock_read is allocated with 1000
bytes in addition to the true size of the pcu_prim struct. Presumably
this is to avoid compatibility problems in case the primitives slightly
grow due to appending new struct members. Lets do the same in osmo-bts.

Change-Id: I99f5204b0563f72f9da427bb7aa5451552d8c5b5
Related: OS#5198
---
M src/osmo-bsc/pcu_sock.c
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/osmo-bsc/pcu_sock.c b/src/osmo-bsc/pcu_sock.c
index 1af9a9d..81198bd 100644
--- a/src/osmo-bsc/pcu_sock.c
+++ b/src/osmo-bsc/pcu_sock.c
@@ -566,7 +566,7 @@
 	struct msgb *msg;
 	int rc;
 
-	msg = msgb_alloc(sizeof(*pcu_prim), "pcu_sock_rx");
+	msg = msgb_alloc(sizeof(*pcu_prim) + 1000, "pcu_sock_rx");
 	if (!msg)
 		return -ENOMEM;
 

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