maps: Terminate 'modes' map correctly.

While we are unlikely to fail here, terminate the modes map correctly
to ensure we don't start running over undefined data.

Signed-off-by: Jes Sorensen <jsorensen@fb.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/maps.c b/maps.c
index a8a4639..a2d293b 100644
--- a/maps.c
+++ b/maps.c
@@ -106,6 +106,7 @@ mapping_t modes[] = {
 	{ "grow", GROW},
 	{ "incremental", INCREMENTAL},
 	{ "auto-detect", AUTODETECT},
+	{ NULL, 0 }
 };
 
 mapping_t faultylayout[] = {