[U-Boot] [RFC/PATCHv2 2/2] Common/cmd_nvedit: Check for env subcommand

[Thomas Weber <weber@corscience.de>]

The env command needs one subcommand. If this is not available
print the usage help.

Signed-off-by: Thomas Weber <weber@corscience.de>
---
 common/cmd_nvedit.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 3fd8abc..52c5e7c 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -848,6 +848,9 @@ static int do_env (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	cmd_tbl_t *cp;
 
+	if (argc < 2)
+		return cmd_usage(cmdtp);
+
 	/* drop initial "env" arg */
 	argc--;
 	argv++;
-- 
1.7.3.2