Fix lua error

lua/entities/gmod_wire_hudindicator/init.lua

@@ -1,8 +1,8 @@
 
 AddCSLuaFile( "cl_init.lua" )
 AddCSLuaFile( "shared.lua" )
 
 include('shared.lua')
 
 DEFINE_BASECLASS("base_wire_entity")
 
@@ -149,13 +149,13 @@
 		-- Send as string (there should be a way to send colors)
 		local ainfo = self.AR.."|"..self.AG.."|"..self.AB
 		local binfo = self.BR.."|"..self.BG.."|"..self.BB
 		umsg.Start("HUDIndicatorStylePercent", pl)
 			umsg.Short(self:EntIndex())
 			umsg.String(ainfo)
 			umsg.String(binfo)
 		umsg.End()
 	elseif (hudstyle == 3) then -- Full Circle Gauge
 		umsg.Start("HUDIndicatorStyleFullCircle", pl)
 			umsg.Short(self:EntIndex())
 			umsg.Float(self.FullCircleAngle)
 		umsg.End()
@@ -172,10 +172,10 @@
 	if not self.RegisteredPlayers[plyuid] then
 		self.RegisteredPlayers[plyuid] = { ply = ply, hookhidehud = hookhidehud, podonly = podonly }
 		-- This is used to check for pod-only status in ClientCheckRegister()
 		self:SetNWBool( plyuid, util.tobool(podonly) )
 	end
 
 	umsg.Start("HUDIndicatorRegister", ply)
 		umsg.Short(eindex)
 		umsg.String(self.HUDDesc or "")
 		umsg.Short(self.HUDShowValue)
@@ -193,7 +193,7 @@
 end
 
 function ENT:UnRegisterPlayer(ply)
 	umsg.Start("HUDIndicatorUnRegister", ply)
 		umsg.Short(self:EntIndex())
 	umsg.End()
 	self.RegisteredPlayers[ply:UniqueID()] = nil
@@ -232,7 +232,7 @@
 
 function ENT:ShowOutput(factor, value)
 	if (factor ~= self.PrevOutput) then
 		self:SetOverlayText( self.PrefixText .. string.format("%.1f", (factor * 100)) .. "%" )
 		self.PrevOutput = factor
 
 		local rf = RecipientFilter()
@@ -249,7 +249,7 @@
 			end
 		end
 
 		umsg.Start("HUDIndicatorFactor", rf)
 			umsg.Short(self:EntIndex())
 			-- Send both to ensure that all styles work properly
 			umsg.Float(factor)
@@ -263,9 +263,9 @@
 	local pl = self:GetPlayer()
 
 	for index,rplayer in pairs(self.RegisteredPlayers) do
-		if (rplayer.ply) then
+		if (IsValid(rplayer.ply)) then
 			if rplayer.ply ~= pl or (self.ShowInHUD or self.PodPly == pl) then
 				umsg.Start("HUDIndicatorHideHUD", rplayer.ply)
 					umsg.Short(self:EntIndex())
 					-- Check player's preference
 					if (rplayer.hookhidehud) then