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 6204759cb0917813e0eff3477edf4b91e5e30e3e..e986b1c29093b94f3cf9c9ee18d8c1ef35c4cec9 100644 (file)
--- a/src/main/client.c
+++ b/src/main/client.c
@@ -1070,7 +1070,11 @@ 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: