Fix X64 build in the case that debugger support is disabled. Change function...

src/debug.cc

Index: src/debug.cc
===================================================================
--- src/debug.cc	(revision 3070)
+++ src/debug.cc	(working copy)
@@ -1614,7 +1614,7 @@
     if (RelocInfo::IsJSReturn(it.rinfo()->rmode())) {
       at_js_return = (it.rinfo()->pc() ==
           addr - Assembler::kPatchReturnSequenceAddressOffset);
-      break_at_js_return_active = it.rinfo()->IsCallInstruction();
+      break_at_js_return_active = it.rinfo()->IsPatchedReturnSequence();
     }
     it.next();
   }