Fix crash in optimized code caused by missing IC data.

runtime/vm/intrinsifier_ia32.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.
 //
 // The intrinsic code below is executed before a method has built its frame.
 // The return address is on the stack and the arguments below it.
 // Registers EDX (arguments descriptor) and ECX (function) must be preserved.
 // Each intrinsification method returns true if the corresponding
 // Dart method was intrinsified.
 
@@ skipping 1532 matching lines @@
   // Get length.
   __ movl(EAX, Address(ESP, + 1 * kWordSize));  // String object.
   __ movl(EAX, FieldAddress(EAX, String::length_offset()));
   __ cmpl(EAX, Immediate(Smi::RawValue(0)));
   __ j(EQUAL, &is_true, Assembler::kNearJump);
   __ LoadObject(EAX, Bool::False());
   __ ret();
   __ Bind(&is_true);
   __ LoadObject(EAX, Bool::True());
   __ ret();
-  return true;
+  return false;
 }
 
 
 bool Intrinsifier::OneByteString_getHashCode(Assembler* assembler) {
   Label compute_hash;
   __ movl(EBX, Address(ESP, + 1 * kWordSize));  // OneByteString object.
   __ movl(EAX, FieldAddress(EBX, String::hash_offset()));
   __ cmpl(EAX, Immediate(0));
   __ j(EQUAL, &compute_hash, Assembler::kNearJump);
   __ ret();
@@ skipping 203 matching lines @@
   __ ret();
 
   __ Bind(&fall_through);
   return false;
 }
 
 #undef __
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32