return 0 on error (#9705)

parity-clib/src/lib.rs

@@ -191,7 +191,7 @@ pub unsafe extern "system" fn Java_io_parity_ethereum_Parity_configFromCli(env:
 			},
 			Err(err) => {
 				let _ = env.throw_new("java/lang/Exception", err.to_string());
-				0
+				return 0
 			}
 		};
 	}