v.external.out: Resource leak in list.c (OSGeo#6326)

Author: ShubhamDesai

vector/v.external.out/list.c

@@ -75,7 +75,7 @@ char *format_options(void)
     ret = NULL;
     list = format_list(&count, &len);
 
-    if (list && len > 0) {
+    if (list) {
         ret = G_malloc((len + 1) * sizeof(char)); /* \0 */
         *ret = '\0';
         for (i = 0; i < count; i++) {