lib: Fixed compiling unit test in systems where NULL isn't of type void*

For example Solaris.

diff --git a/src/lib/test-ioloop.c b/src/lib/test-ioloop.c
index a028f51a97039fc17f9ce9cb5eb0326764c7fd8b..049b0d516a3373b370393276d7faf9ae8bce6751 100644 (file)
--- a/src/lib/test-ioloop.c
+++ b/src/lib/test-ioloop.c
@@ -79,9 +79,9 @@ static void test_ioloop_find_fd_conditions(void)
        for (i = 0; i < N_ELEMENTS(tests); i++) {
                if (socketpair(AF_UNIX, SOCK_STREAM, 0, tests[i].fd) < 0)
                        i_fatal("socketpair() failed: %m");
-               tests[i].io = io_add(tests[i].fd[0], tests[i].condition, io_callback, NULL);
+               tests[i].io = io_add(tests[i].fd[0], tests[i].condition, io_callback, (void *)NULL);
        }
-       io = io_add(tests[i-1].fd[0], IO_WRITE, io_callback, NULL);
+       io = io_add(tests[i-1].fd[0], IO_WRITE, io_callback, (void *)NULL);
        tests[i-1].condition |= IO_WRITE;
 
        for (i = 0; i < N_ELEMENTS(tests); i++)