[C API] Make TypeBuilderSetSubType take a heap type (#5045)

Fixes #5041

1 files changed, 4 insertions, 4 deletions

diff --git a/src/wasm-type.h b/src/wasm-type.h
index 778318794..940009cbe 100644
--- a/src/wasm-type.h
+++ b/src/wasm-type.h
@@ -599,9 +599,9 @@ struct TypeBuilder {
   Type getTempRefType(HeapType heapType, Nullability nullable);
 
   // In nominal mode, or for nominal types, declare the HeapType being built at
-  // index `i` to be an immediate subtype of the HeapType being built at index
-  // `j`. Does nothing for equirecursive types.
-  void setSubType(size_t i, size_t j);
+  // index `i` to be an immediate subtype of the given HeapType. Does nothing
+  // for equirecursive types.
+  void setSubType(size_t i, HeapType super);
 
   // Create a new recursion group covering slots [i, i + length). Groups must
   // not overlap or go out of bounds.
@@ -669,7 +669,7 @@ struct TypeBuilder {
     }
     Entry& subTypeOf(Entry other) {
       assert(&builder == &other.builder);
-      builder.setSubType(index, other.index);
+      builder.setSubType(index, other);
       return *this;
     }
   };