merge_config.sh: Display usage if given too few arguments

Two or more arguments are always expected. Show usage and exit if
given less.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Michal Marek <mmarek@suse.cz>

diff --git a/scripts/kconfig/merge_config.sh b/scripts/kconfig/merge_config.sh
index 81b0c61bb9e2060c18fb9dd315e8a9e0ae8a195a..2ab91b9b100dc6f6cfba663d05580e14930a3def 100755 (executable)
--- a/scripts/kconfig/merge_config.sh
+++ b/scripts/kconfig/merge_config.sh
@@ -77,6 +77,11 @@ while true; do
        esac
 done
 
+if [ "$#" -lt 2 ] ; then
+       usage
+       exit
+fi
+
 INITFILE=$1
 shift;