Snippets for alsa-lib 1.2.16.1 from Alpine riscv64

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-riscv64/main/alsa-lib/alsa-lib-1.2.16.1-r0.log.

• seq-sender.c:150:62: warning: variable 'pcm_flag' set but not used [-Wunused-but-set-variable]
    150 |         int client, port, queue, max, err, v1, v2, time = 0, pcm_flag = 0;
        |                                                              ^~~~~~~~
  

• user-ctl-element-set.c:523:22: warning: unused variable 'j' [-Wunused-variable]
    523 |         unsigned int j;
        |                      ^