fix getstack for gen.ef

index.js

@@ -158,7 +158,7 @@ function errorFirst()
             throw new Error('Broken control flow! Callback'+
                 getStack(thread._current)+
                 '\nmust be called to resume thread, but this one is called instead:'+
-                getStack(fn._stack)+'\n--'
+                getStack(fn)+'\n--'
             );
         }
         if (arguments[0])

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gen-thread",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "author": {
     "name": "Vitaliy Filippov",
     "email": "vitalif@yourcmc.ru"