Fix copy-paste error in SI6

Fix error which prevented enabling DTX for half-rate channels.

Change-Id: I7d41df0068783c8fb33ddeeab1d1dcf63c2c259f
Reviewed-on: https://gerrit.osmocom.org/101
Tested-by: Jenkins Builder
Reviewed-by: Holger Freyther <holger@freyther.de>
diff --git a/openbsc/src/libbsc/system_information.c b/openbsc/src/libbsc/system_information.c
index 1f1d81e..bf20394 100644
--- a/openbsc/src/libbsc/system_information.c
+++ b/openbsc/src/libbsc/system_information.c
@@ -932,7 +932,7 @@
 	si6->cell_options = bts->si_common.cell_options;
 	si6->ncc_permitted = bts->si_common.ncc_permitted;
 	/* allow/disallow DTXu */
-	gsm48_set_dtx(&si6->cell_options, bts->dtxu, bts->dtxu, true);
+	gsm48_set_dtx(&si6->cell_options, bts->dtxu, bts->dtxu, false);
 
 	/* SI6 Rest Octets: 10.5.2.35a: PCH / NCH info, VBS/VGCS options */