[fix] Only set is_reinstall if it's needed

setup/so-setup

@@ -54,7 +54,6 @@ while [[ $# -gt 0 ]]; do
 	esac
 done
 
-is_reinstall=false
 if [[ -f /root/accept_changes ]]; then
 	is_reinstall=true
 
@@ -429,7 +428,7 @@ whiptail_make_changes
 # From here on changes will be made.
 echo "1" > /root/accept_changes
 
-if [[ $is_reinstall == true ]]; then
+if [[ $is_reinstall ]]; then
 	reinstall_init
 fi