Fix definition of CreateArrayComp::InputAt.

runtime/vm/intermediate_language.cc

Index: runtime/vm/intermediate_language.cc
diff --git a/runtime/vm/intermediate_language.cc b/runtime/vm/intermediate_language.cc
index 0bd7f486a76fa298fc165a719c1f7aa3229f5825..b28ef8a762f550a1e9fa2534462da2340deeb0cc 100644
--- a/runtime/vm/intermediate_language.cc
+++ b/runtime/vm/intermediate_language.cc
@@ -131,6 +131,15 @@ intptr_t CreateArrayComp::InputCount() const {
 }
 
 
+Value* CreateArrayComp::InputAt(intptr_t i) const {
+  if (i == 0) {
+    return element_type();
+  } else {
+    return ElementAt(i - 1);
+  }
+}
+
+
 intptr_t BranchInstr::InputCount() const {
   return 1;
 }