修复一个可能是导致CC报错后程序闪退的问题

parts/ai.lua

@@ -279,10 +279,11 @@ return{
 		end,
 	},
 	["CC"]=CC and{
-		[0]=NULL,
+		[0]=function(P)
+			LOG.print("CC is dead ("..P.id..")","error")
+		end,
 		function(P)--Start thinking
 			if not pcall(CC.think,P.AI_bot)then
-				LOG.print("CC is dead ("..P.id..")","error")
 				return 0
 			end
 			return 2
@@ -316,7 +317,6 @@ return{
 					return 2
 				end
 			else
-				LOG.print("CC is dead ("..P.id..")","error")
 				return 0
 			end
 		end,

parts/player/update.lua

@@ -145,7 +145,9 @@ function update.alive(P,dt)
 		local C=P.AI_keys
 		P.AI_delay=P.AI_delay-1
 		if not C[1]then
-			P.AI_stage=AIFUNC[P.AI_mode][P.AI_stage](P,C)
+			if P.AI_stage then
+				P.AI_stage=AIFUNC[P.AI_mode][P.AI_stage](P,C)
+			end
 		elseif P.AI_delay<=0 then
 			P:pressKey(C[1])P:releaseKey(C[1])
 			if P.AI_mode~="CC"or C[1]>3 then