Push flags in RenderOverride for FLIR (#3578)

If any other RenderOverride uses flags, a nil error will occur:
```
- gamemodes/sandbox/entities/effects/propspawn.lua:106: bad argument #1 to 'band' (number expected, got nil)
1. band - [C]:-1
 2. BackupRenderOverride - gamemodes/sandbox/entities/effects/propspawn.lua:106
  3. <unknown> - addons/wire/lua/wire/flir.lua:53
   4. DrawModel - [C]:-1
    5. <unknown> - addons/wire/lua/wire/flir.lua:139
     6. <unknown> - addons/hook-library/lua/includes/modules/hook.lua:313
```

Author: Astralcircle

lua/wire/flir.lua

@@ -47,12 +47,12 @@ FLIR.mat = Material("phoenix_storms/concrete0")
 FLIR.transmat = Material("phoenix_storms/iron_rails")
 FLIR.hide = false
 
-function FLIR.Render(self)
+function FLIR.Render(self, flags)
 	if not FLIR.hide then
 		if self.BackupRenderOverride then
-			self:BackupRenderOverride()
+			self:BackupRenderOverride(flags)
 		end
-		self:DrawModel()
+		self:DrawModel(flags)
 
 		return
 	end