correct typo

diff --git a/programs/instantshutdown b/programs/instantshutdown
index 68a6045..2c09f98 100755 (executable)
--- a/programs/instantshutdown
+++ b/programs/instantshutdown
@@ -11,7 +11,7 @@ if [ "$(pgrep instantshutdown | wc -l)" -gt 2 ]; then
     exit
 fi
 
-if [ -z "$1" ]; then
+if [ -n "$1" ]; then
     answer="$1"
 else
     answer="$(echo 'cancel