Fix compiler warning:

runtime/vm/intermediate_language.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cpu.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
@@ skipping 1756 matching lines @@
       value()->definition()->AsUnboxedIntConverter();
   if ((box_defn != NULL) && (box_defn->representation() == from())) {
     if (box_defn->from() == to()) {
       return box_defn->value()->definition();
     }
 
     UnboxedIntConverterInstr* converter = new UnboxedIntConverterInstr(
         box_defn->from(),
         representation(),
         box_defn->value()->CopyWithType(),
-        to() == kUnboxedInt32 ? deopt_id_ : NULL);
+        to() == (kUnboxedInt32 ? deopt_id_ : 0));

[srdjan, 2014/09/16 18:55:19]

kNoRepresentation?

I do not understand this code. Slava?

[Vyacheslav Egorov (Google), 2014/09/16 18:57:05]

should be 

(to() == kUnboxedInt32) ? deopt_id_ : Isolate::kNoDeoptId.

Thanks for catching this! My compiler does not warn on this obviously incorrect
code for some reason.

     if ((representation() == kUnboxedInt32) && is_truncating()) {
       converter->mark_truncating();
     }
     flow_graph->InsertBefore(this, converter, env(), FlowGraph::kValue);
     return converter;
   }
 
   UnboxIntegerInstr* unbox_defn = value()->definition()->AsUnboxInteger();
   if (unbox_defn != NULL &&
       (from() == kUnboxedMint) &&
@@ skipping 1355 matching lines @@
     case Token::kTRUNCDIV: return 0;
     case Token::kMOD: return 1;
     default: UNIMPLEMENTED(); return -1;
   }
 }
 
 
 #undef __
 
 }  // namespace dart