Merge pull request #2 from flightaware/marshalling_error

If there's a marshalling error in zoo_awexists wait for the result and return "ZMARSHALLINGERROR".

generic/zookeepertcl.c

@@ -1269,7 +1269,7 @@ zootcl_exists_subcommand(Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], ZO
  zsc->syncDone = 0;
  status = zoo_awexists (zh, path, wfn, (void *)watcherCallbackObj, zootcl_sync_stat_completion_callback, zsc);
  // handle errors from the call like bad arguments and stuff
- if (status != ZOK) {
+ if (status != ZOK && status != ZMARSHALLINGERROR) {
  ckfree (zsc);
  return zootcl_set_tcl_return_code (interp, status);
  }
@@ -1280,6 +1280,10 @@ zootcl_exists_subcommand(Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], ZO
  return TCL_ERROR;
  }
 
+ if(status == ZMARSHALLINGERROR) {
+ return zootcl_set_tcl_return_code (interp, status);
+ }
+
  // ok, we got our zsc filled up, if the status isn't OK,
  // error out
  status = zsc->rc;