l1ctl_proto: fix unpacked struct in l1ctl_gprs_dl_block_ind

The __attribute__((packed)) does not apply to inner structures.
I found this problem when testing the new TTCN-3 message definitions.

Change-Id: I90e74330073a9090c2638fc3175ff0216b0da5ec
Related: OS#5500
---
M include/l1ctl_proto.h
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/include/l1ctl_proto.h b/include/l1ctl_proto.h
index 9bf40d2..3512424 100644
--- a/include/l1ctl_proto.h
+++ b/include/l1ctl_proto.h
@@ -376,7 +376,7 @@
 /* payload of L1CTL_GPRS_DL_BLOCK_IND */
 struct l1ctl_gprs_dl_block_ind {
 	struct l1ctl_gprs_block_hdr hdr;
-	struct {
+	struct __attribute__((packed)) {
 		uint16_t ber10k;	/* Bit Error Rate */
 		int16_t ci_cb;		/* C/I in centiBels */
 		uint8_t rx_lev;		/* RxLev 0..63 */

