Fixed lossy events.

modules/base/header.lua

@@ -7,5 +7,4 @@ function l()
 end
 function h(...)
  computer.pushSignal(...)
- coroutine.yield()
 end

modules/drivers/keyboard.lua

@@ -4,7 +4,9 @@ function readln()
  while true do
   if ev[1] == "key_down" then
    if ev[3] == 13 then
-    h("display","\127\n") return s
+    h("display","\127\n")
+    C.yield()
+    return s
    elseif ev[3] == 8 then
     if s:len()>0 then s=s:sub(1,-2) h("display","\127\127|") end
    elseif ev[3] > 31 and ev[3] < 127 then