Avoid dummy "unknown option dccp-service" error

Signed-off-by: Rémi Denis-Courmont <rem@videolan.org>

src/network/io.c

@@ -125,6 +125,8 @@ int net_Socket (vlc_object_t *p_this, int family, int socktype,
 #endif
 
 #ifdef DCCP_SOCKOPT_SERVICE
+    if (socktype == SOL_DCCP)
+    {
         char *dccps = var_CreateGetNonEmptyString (p_this, "dccp-service");
         if (dccps != NULL)
         {
@@ -132,6 +134,7 @@ int net_Socket (vlc_object_t *p_this, int family, int socktype,
                         (strlen (dccps) + 3) & ~3);
             free (dccps);
         }
+    }
 #endif
 
     return fd;