fix format in test (#515)

Fixes warning under 32-bit.

diff --git a/test/test_syscalls.c b/test/test_syscalls.c
index e1dbab3a9f86f8fe704a0d3da2c4db4dd148a4fe..18326c0706a7b780c7cfd57c70fd1003ad1ebf39 100644 (file)
--- a/test/test_syscalls.c
+++ b/test/test_syscalls.c
@@ -1746,7 +1746,7 @@ static int test_socket(void)
 
        start_test("socket");
        if (strlen(testsock) + 1 > sizeof(su.sun_path)) {
-               fprintf(stderr, "Need to shorten mount point by %lu chars\n",
+               fprintf(stderr, "Need to shorten mount point by %zu chars\n",
                        strlen(testsock) + 1 - sizeof(su.sun_path));
                return -1;
        }