sd-radv: follow our usualy rule that destructors can take NULL

diff --git a/src/libsystemd-network/sd-radv.c b/src/libsystemd-network/sd-radv.c
index bedc53e2bd5259df01e4495279f1cc356213fc6e..b45e80e4c167f212df1ee32bc4c156efdb91a508 100644 (file)
--- a/src/libsystemd-network/sd-radv.c
+++ b/src/libsystemd-network/sd-radv.c
@@ -88,7 +88,8 @@ static void radv_reset(sd_radv *ra) {
 }
 
 static sd_radv *radv_free(sd_radv *ra) {
-        assert(ra);
+        if (!ra)
+                return NULL;
 
         while (ra->prefixes) {
                 sd_radv_prefix *p = ra->prefixes;