Minor comment updates

Signed-off-by: Ben Taylor <ben.taylor@linaro.org>
diff --git a/programs/fuzz/fuzz_x509crl.c b/programs/fuzz/fuzz_x509crl.c
index ae0f852..af50e25 100644
--- a/programs/fuzz/fuzz_x509crl.c
+++ b/programs/fuzz/fuzz_x509crl.c
@@ -21,7 +21,7 @@
     if (ret == 0) {
         ret = mbedtls_x509_crl_info((char *) buf, sizeof(buf) - 1, " ", &crl);
     }
-#else /* MBEDTLS_X509_REMOVE_INFO */
+#else /* !MBEDTLS_X509_REMOVE_INFO */
     ((void) ret);
     ((void) buf);
 #endif /* !MBEDTLS_X509_REMOVE_INFO */