env.sh: Fixed the wrong arguments input by set command. [1/1]

PD#SWPL-67525

Problem:
Fixed the wrong arguments input by set command.

Solution:
Fixed the wrong arguments input by set command.

Verify:
N/A

Change-Id: If47e43e43905ef01efade605f43204d325d60531
Signed-off-by: xiaohu.huang <xiaohu.huang@amlogic.com>
diff --git a/env.sh b/env.sh
index 98ef5b3..1031043 100755
--- a/env.sh
+++ b/env.sh
@@ -47,13 +47,12 @@
 
 source scripts/gen_build_combination.sh
 
-if [ -n "$1" ]; then
-	if [ $1 == "-h" ]; then
-		usage
-		exit 0
-	else
-		PROJECT="$1 $2 $3 $4"
-	fi
+if [ -n "$1" ] && [ $1 == "-h" ]; then
+	usage
+	return 0
+elif [ $# -eq 4 ]; then
+	PROJECT="$1 $2 $3 $4"
+	echo "Choose project:$PROJECT"
 else
 	unset ARRAY