package:jnigen 0.9.1 generates incorrect bindings for 32-bit Android devices

[brianquinlan]

This manifested as cronet_http: Crash occurring on 32bit android devices since version 1.2.1.

package:jnigen generates this code:

 static final _enableHttpCache = ProtectedJniExtensions.lookup<
             ffi.NativeFunction<
                 jni.JniResult Function(ffi.Pointer<ffi.Void>,
                     jni.JMethodIDPtr, ffi.VarArgs<(ffi.Int64, ffi.Int64)>)>>(
         "globalEnv_CallObjectMethod")
     .asFunction<
         jni.JniResult Function(
             ffi.Pointer<ffi.Void>, jni.JMethodIDPtr, int, int)>();

For this signature:

CronetEngine.Builder enableHttpCache(int cacheMode, long maxSize);

I'm guessing that the first argument should be an Int to support 32-bit devices? i.e.

 static final _enableHttpCache = ProtectedJniExtensions.lookup<
             ffi.NativeFunction<
                 jni.JniResult Function(ffi.Pointer<ffi.Void>,
-                     jni.JMethodIDPtr, ffi.VarArgs<(ffi.Int64, ffi.Int64)>)>>(
+                     jni.JMethodIDPtr, ffi.VarArgs<(ffi.Int, ffi.Int64)>)>>(