lmkd: Avoid potential out of buffer write

Our buffer needs enough space for the '\0' terminator character
as well.

Test: TreeHugger
Change-Id: Ib85d08dacf87b93d5f8b35b033ca0ec478868e66
diff --git a/lmkd/lmkd.c b/lmkd/lmkd.c
index 449088a..28f7616 100644
--- a/lmkd/lmkd.c
+++ b/lmkd/lmkd.c
@@ -1394,7 +1394,7 @@
     char *buf;
     char *save_ptr;
     char *line;
-    char zone_name[LINE_MAX];
+    char zone_name[LINE_MAX + 1];
     struct zoneinfo_node *node = NULL;
     int node_idx = 0;
     int zone_idx = 0;