Allow empty strings to mean NULL

this lets us specify the default (i.e. NULL) virtual server

diff --git a/src/main/client.c b/src/main/client.c
index d140d81..b406943 100644 (file)
--- a/src/main/client.c
+++ b/src/main/client.c
@@ -1053,7 +1053,11 @@ RADCLIENT *client_create(RADCLIENT_LIST *clients, REQUEST *request)
                case PW_TYPE_STRING_PTR:
                        p = (char **) ((char *) c + dynamic_config[i].offset);
                        if (*p) free(*p);
-                       *p = strdup(vp->vp_strvalue);
+                       if (vp->vp_strvalue[0]) {
+                               *p = strdup(vp->vp_strvalue);
+                       } else {
+                               *p = NULL;
+                       }
                        break;
 
                case PW_TYPE_BOOLEAN: