[VM] Fix typo in 54d842a89c722b7c27762b96ba21fab55a2ad55a.

Change-Id: Ibc8bb57aeb54772dceab2a55c41811e80bae3086
Reviewed-on: https://dart-review.googlesource.com/53700
Reviewed-by: Régis Crelier <regis@google.com>
diff --git a/runtime/vm/compiler/frontend/kernel_binary_flowgraph.cc b/runtime/vm/compiler/frontend/kernel_binary_flowgraph.cc
index d7a97ee..e22fa75 100644
--- a/runtime/vm/compiler/frontend/kernel_binary_flowgraph.cc
+++ b/runtime/vm/compiler/frontend/kernel_binary_flowgraph.cc
@@ -5587,7 +5587,7 @@
                                       Symbols::PrependTypeArguments()));
       ASSERT(!prepend_function.IsNull());
 
-      body += StaticCall(TokenPosition::kNoSource, prepend_function, 3,
+      body += StaticCall(TokenPosition::kNoSource, prepend_function, 4,
                          ICData::kStatic);
       body += StoreLocal(TokenPosition::kNoSource, fn_type_args);
       body += Drop();