Fixed another crash

git-svn-id: https://svn.code.sf.net/p/rathena/svn/branches/stable@471 54d463be-8e91-2dee-dedb-b68131a5f0ec

Changelog.txt

@@ -1,5 +1,7 @@
 Date	Added
 12/5
+	* Fixed another crash sending updates to disconnected 
+	  clients [MouseJstr]
 	* Fixed the range_check again to stop it from crashing 
 	  servers [MouseJstr]
 	* removed stubbed out unfinished atcommands as per Cameri [MouseJstr]

src/map/clif.c

@@ -3722,6 +3722,9 @@ void clif_getareachar_mob(struct map_session_data* sd,struct mob_data* md)
 	int len;
 	nullpo_retv(sd);
 	nullpo_retv(md);
+	
+	if (session[sd->fd] == NULL)
+		return;
 
 	if(md->state.state == MS_WALK){
 		len = clif_mob007b(md,WFIFOP(sd->fd,0));
@@ -3906,6 +3909,9 @@ int clif_01ac(struct block_list *bl)
 
 	sd=va_arg(ap,struct map_session_data*);
 
+	if (sd == NULL || session[sd->fd] == NULL)
+		return 0;
+
 	switch(bl->type){
 	case BL_PC:
 		if(sd==(struct map_session_data*)bl)