Fix wasm table access when accessing functions in splitted module

src/preamble.js

@@ -503,10 +503,9 @@ var splitModuleProxyHandler = {
       // When the table is dynamically laid out, the placeholder functions names
       // are offsets from the table base. In the main module, the table base is
       // always 1.
-      return wasmTable.get(1 + parseInt(prop))(...args);
-#else
-      return wasmTable.get(prop)(...args);
+      prop = 1 + parseInt(prop)
 #endif
+      return wasmTable.get({{{ toIndexType('prop') }}})(...args);
 #endif
     }
   }