Merge pull request #505 from Howard-Zhou-77/master

1.修复yxs_fanji的bug；2.修改全局技能g_du_give的逻辑，有usedu不给毒

card/yongjian.js

@@ -561,6 +561,7 @@ game.import('card',function(lib,game,ui,get,ai,_status){
 						prompt:'是否发动【赠毒】？',
 						prompt2:'将本次获得的【毒】交给其他角色',
 						ai1:function(card){
+							if(_status.event.player.hasSkillTag("usedu")) return 0;
 							if(!ui.selected.cards.length) return 1;
 							return 0;
 						},

character/yxs.js

@@ -105,7 +105,7 @@ game.import('character',function(lib,game,ui,get,ai,_status){
                 priority:12,
                 filter:function (event,player){      
                 if(!player.countCards('h',{name:'sha'})) return false;
-        return event.card.name=='sha'||event.card.name=='juedou';
+        return event.card&&(event.card.name=='sha'||event.card.name=='juedou');
     },
                 content:function (){    
                 player.addTempSkill('yxs_fanji2','shaAfter');