DBC: Fix not-stopping/crashing at fast Smi op breakpoints.

runtime/vm/debugger.cc

 // Copyright (c) 2012, 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/debugger.h"
 
 #include "include/dart_api.h"
 
 #include "vm/code_generator.h"
 #include "vm/code_patcher.h"
@@ skipping 1090 matching lines @@
       token_pos_(token_pos),
       pc_(pc),
       line_number_(-1),
       is_enabled_(false),
       bpt_location_(NULL),
       next_(NULL),
       breakpoint_kind_(kind),
 #if !defined(TARGET_ARCH_DBC)
       saved_value_(Code::null())
 #else
-      saved_value_(Bytecode::kTrap)
+      saved_value_(Bytecode::kTrap),
+      saved_value_fastsmi_(Bytecode::kTrap)
 #endif
     {
   ASSERT(!code.IsNull());
   ASSERT(token_pos_.IsReal());
   ASSERT(pc_ != 0);
   ASSERT((breakpoint_kind_ & kSafepointKind) != 0);
 }
 
 
 CodeBreakpoint::~CodeBreakpoint() {
@@ skipping 2194 matching lines @@
 
 void Debugger::RegisterCodeBreakpoint(CodeBreakpoint* bpt) {
   ASSERT(bpt->next() == NULL);
   bpt->set_next(code_breakpoints_);
   code_breakpoints_ = bpt;
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart