[interpreter] Fix the interface descriptor for interpreter dispatch.

The bytecode offset parameter was Int32, but everywhere else it's an IntPtr.

BUG=

Review-Url: https://codereview.chromium.org/2369033003
Cr-Commit-Position: refs/heads/master@{#39777}

src/interface-descriptors.cc

@@ -417,9 +417,9 @@ void ApiCallbackDescriptor::InitializePlatformIndependent(
 void InterpreterDispatchDescriptor::InitializePlatformIndependent(
     CallInterfaceDescriptorData* data) {
   // kAccumulator, kBytecodeOffset, kBytecodeArray, kDispatchTable
-  MachineType machine_types[] = {MachineType::AnyTagged(), MachineType::Int32(),
-                                 MachineType::AnyTagged(),
-                                 MachineType::AnyTagged()};
+  MachineType machine_types[] = {
+      MachineType::AnyTagged(), MachineType::IntPtr(), MachineType::AnyTagged(),
+      MachineType::AnyTagged()};
   data->InitializePlatformIndependent(arraysize(machine_types), 0,
                                       machine_types);
 }