msgb talloc ctx: initialize in all main() scopes

Add msgb_talloc_ctx_init() call to many main() functions still lacking a
msgb talloc context.

Change-Id: Ib0d6751260659cabf18a7ce80680ba2fb4228ea1
diff --git a/openbsc/src/utils/meas_vis.c b/openbsc/src/utils/meas_vis.c
index 4f7e632..061a7a4 100644
--- a/openbsc/src/utils/meas_vis.c
+++ b/openbsc/src/utils/meas_vis.c
@@ -264,6 +264,8 @@
 	char *header[1];
 	char *title[1];
 
+	msgb_talloc_ctx_init(NULL, 0);
+
 	printf("sizeof(gsm_meas_rep)=%u\n", sizeof(struct gsm_meas_rep));
 	printf("sizeof(meas_feed_meas)=%u\n", sizeof(struct meas_feed_meas));