send initial NOTIFY with non-empty body

NOTIFYs are accepted by Cisco SPA504g phones now.

sipwise_patches/presence_dialoginfo_notify.patch

@@ -0,0 +1,57 @@
+diff --git a/modules_k/presence_dialoginfo/notify_body.c b/modules_k/presence_dialoginfo/notify_body.c
+index 6a63d3e..4f49998 100644
+--- a/modules_k/presence_dialoginfo/notify_body.c
++++ b/modules_k/presence_dialoginfo/notify_body.c
+@@ -66,8 +66,10 @@ str* dlginfo_agg_nbody(str* pres_user, str* pres_domain, str** body_array, int n
+ 	LM_DBG("[pres_user]=%.*s [pres_domain]= %.*s, [n]=%d\n",
+ 			pres_user->len, pres_user->s, pres_domain->len, pres_domain->s, n);
+ 
+-	if(body_array== NULL)
+-		return NULL;
++	if(body_array== NULL) {
++		n = 0; /* just to be safe */
++		/* return NULL; */
++        }
+ 
+ 	n_body= agregate_xmls(pres_user, pres_domain, body_array, n);
+ 	LM_DBG("[n_body]=%p\n", n_body);
+@@ -106,13 +108,17 @@ str* agregate_xmls(str* pres_user, str* pres_domain, str** body_array, int n)
+ 	LM_DBG("[pres_user]=%.*s [pres_domain]= %.*s, [n]=%d\n",
+ 			pres_user->len, pres_user->s, pres_domain->len, pres_domain->s, n);
+ 
+-	xml_array = (xmlDocPtr*)pkg_malloc( n*sizeof(xmlDocPtr));
+-	if(xml_array== NULL)
++        if (n > 0)
+ 	{
+-		LM_ERR("while allocating memory");
+-		return NULL;
++		xml_array = (xmlDocPtr*)pkg_malloc( n*sizeof(xmlDocPtr));
++		if(xml_array== NULL)
++		{
++			LM_ERR("while allocating memory");
++			return NULL;
++		}
++		memset(xml_array, 0, n*sizeof(xmlDocPtr)) ;
+ 	}
+-	memset(xml_array, 0, n*sizeof(xmlDocPtr)) ;
++	else xml_array = NULL;
+ 
+ 	/* parse all the XML documents */
+ 	for(i=0; i<n; i++)
+@@ -133,14 +139,14 @@ str* agregate_xmls(str* pres_user, str* pres_domain, str** body_array, int n)
+ 		j++;
+ 
+ 	} 
+-
++#if 0
+ 	if(j== 0)  /* no body */
+ 	{
+ 		if(xml_array)
+ 			pkg_free(xml_array);
+ 		return NULL;
+ 	}
+-
++#endif
+ 	/* n: number of bodies in total */
+ 	/* j: number of useful bodies; created XML structures */
+ 	/* i: loop counter */