[Hamlib-developer] [Hamlib/Hamlib] 6fa16e: Fix mingw compile warning

[Michael B. <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/Hamlib/Hamlib
  Commit: 6fa16ea77fa9d1a08cf696f40fae8c07603b94d8
      https://github.com/Hamlib/Hamlib/commit/6fa16ea77fa9d1a08cf696f40fae8c07603b94d8
  Author: Mike Black W9MDB <mdb...@ya...>
  Date:   2023-05-07 (Sun, 07 May 2023)

  Changed paths:
    M src/multicast.c

  Log Message:
  -----------
  Fix mingw compile warning
https://github.com/Hamlib/Hamlib/issues/695