Fix int comparison with vector::size.

src/compiler/node.cc

Index: src/compiler/node.cc
diff --git a/src/compiler/node.cc b/src/compiler/node.cc
index d12aeb82b3572c1d44b966c95335147e84ea3337..dcb3bfe9e34e38f72ae6bbbb36ff9c5540027ca9 100644
--- a/src/compiler/node.cc
+++ b/src/compiler/node.cc
@@ -18,7 +18,7 @@ void Node::CollectProjections(NodeVector* projections) {
     if ((*i)->opcode() != IrOpcode::kProjection) continue;
     int32_t index = OpParameter<int32_t>(*i);
     DCHECK_GE(index, 0);
-    DCHECK_LT(index, projections->size());
+    DCHECK_LT(index, static_cast<int32_t>(projections->size()));
     DCHECK_EQ(NULL, (*projections)[index]);
     (*projections)[index] = *i;
   }