prevent buffer underflows with empty lines

git-svn-id: svn://busybox.net/trunk/busybox@17108 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index a95ba93e2..ca722b05d 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -390,7 +390,7 @@ static int conf_choice(struct menu *menu)
                 }
                 if (!child)
                         continue;
-                if (line[strlen(line) - 1] == '?') {
+                if (strlen(line) > 0 && line[strlen(line) - 1] == '?') {
                         printf("\n%s\n", child->sym->help ?
                                 child->sym->help : nohelp_text);
                         continue;