MT#55631 dialog: support dlg_set_var() with empty totag

* support setting vars for non established dialogs

Change-Id: Id31f8057e9d29d187751f695cf7ae3df6701b735

debian/patches/series

@@ -58,6 +58,7 @@ sipwise/db_redis_sscan_fix_empty_key.patch
 sipwise/kamctl-TMPDIR-config.patch
 sipwise/lcr-stopper_mode-parameter.patch
 sipwise/dialog-support-profile_get_size-for-all-profiles.patch
+sipwise/dialog-dlg_set_var-support-empty-totag-param.patch
 sipwise/pv_headers-rework-pvh_remove_header_param.patch
 ### active development
 sipwise/presence-be-more-resilient-doing-clean-up.patch

debian/patches/sipwise/dialog-dlg_set_var-support-empty-totag-param.patch

@@ -0,0 +1,35 @@
+From: Victor Seva <vseva@sipwise.com>
+Date: Fri, 4 Nov 2022 11:23:59 +0100
+Subject: MT#55631 dialog: dlg_set_var() support empty totag parameter
+
+* support setting vars for non established dialogs
+---
+ src/modules/dialog/dialog.c | 8 ++------
+ 1 file changed, 2 insertions(+), 6 deletions(-)
+
+diff --git a/src/modules/dialog/dialog.c b/src/modules/dialog/dialog.c
+index 3ffcd36..a377515 100644
+--- a/src/modules/dialog/dialog.c
++++ b/src/modules/dialog/dialog.c
+@@ -1660,7 +1660,7 @@ static int ki_dlg_set_var(sip_msg_t *msg, str *sc, str *sf, str *st, str *key, s
+ 		LM_ERR("invalid From tag parameter\n");
+ 		return -1;
+ 	}
+-	if(st==NULL || st->s==NULL || st->len == 0) {
++	if(st==NULL) {
+ 		LM_ERR("invalid To tag parameter\n");
+ 		return -1;
+ 	}
+@@ -1704,11 +1704,7 @@ static int w_dlg_set_var(struct sip_msg *msg, char *ci, char *ft, char *tt, char
+ 		LM_ERR("unable to get To Tag\n");
+ 		return -1;
+ 	}
+-	if(st.s==NULL || st.len == 0)
+-	{
+-		LM_ERR("invalid To tag parameter\n");
+-		return -1;
+-	}
++
+ 	if(fixup_get_svalue(msg, (gparam_p)key, &k)!=0)
+ 	{
+ 		LM_ERR("unable to get key name\n");