Fix invalid use of int in Zone.

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index 105e2550402faba70676a6bc3848f59f17f0ee6e..e8a52a61e12213577b48711ba768ad36ac117252 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -1064,7 +1064,7 @@ void InstructionSelector::VisitSwitch(Node* node, BasicBlock** branches,
   Node* const value = node->InputAt(0);
   size_t const input_count = branch_count + 1;
   InstructionOperand* const inputs =
-      zone()->NewArray<InstructionOperand>(static_cast<int>(input_count));
+      zone()->NewArray<InstructionOperand>(input_count);
   inputs[0] = g.UseRegister(value);
   for (size_t index = 0; index < branch_count; ++index) {
     inputs[index + 1] = g.Label(branches[index]);