Update init.lua

init.lua

@@ -78,12 +78,14 @@ end
 
 function whiteurl()
     if WhiteCheck then
+    	if wturlrules ~=nil then
             for _,rule in pairs(wturlrules) do
                 if ngxmatch(ngx.var.request_uri,rule,"isjo") then
                     return true 
                  end
             end
         end
+    end
     return false
 end