var_CreateGetNEString simplications

src/network/udp.c

@@ -321,17 +321,15 @@ net_IPv4Join (vlc_object_t *obj, int fd,
     socklen_t optlen;
 
     /* Multicast interface IPv4 address */
-    char *iface = var_CreateGetString (obj, "miface-addr");
-    if (iface != NULL)
-    {
-        if ((*iface)
+    char *iface = var_CreateGetNonEmptyString (obj, "miface-addr");
+    if ((iface != NULL)
      && (inet_pton (AF_INET, iface, &id) <= 0))
     {
         msg_Err (obj, "invalid multicast interface address %s", iface);
         free (iface);
         goto error;
     }
-    }
+    free (iface);
 
     memset (&opt, 0, sizeof (opt));
     if (src != NULL)
@@ -428,10 +426,8 @@ net_SourceSubscribe (vlc_object_t *obj, int fd,
 {
     int level, iid = 0;
 
-    char *iface = var_CreateGetString (obj, "miface");
+    char *iface = var_CreateGetNonEmptyString (obj, "miface");
     if (iface != NULL)
-    {
-        if (*iface)
     {
         iid = if_nametoindex (iface);
         if (iid == 0)
@@ -440,7 +436,6 @@ net_SourceSubscribe (vlc_object_t *obj, int fd,
             free (iface);
             return -1;
         }
-        }
         free (iface);
     }
 
@@ -661,18 +656,16 @@ int __net_ConnectDgram( vlc_object_t *p_this, const char *psz_host, int i_port,
         if( i_hlim > 0 )
             net_SetMcastHopLimit( p_this, fd, ptr->ai_family, i_hlim );
 
-        str = var_CreateGetString (p_this, "miface");
+        str = var_CreateGetNonEmptyString (p_this, "miface");
         if (str != NULL)
         {
-            if (*str)
             net_SetMcastOut (p_this, fd, ptr->ai_family, str, NULL);
             free (str);
         }
 
-        str = var_CreateGetString (p_this, "miface-addr");
+        str = var_CreateGetNonEmptyString (p_this, "miface-addr");
         if (str != NULL)
         {
-            if (*str)
             net_SetMcastOut (p_this, fd, ptr->ai_family, NULL, str);
             free (str);
         }