fix: Handle SENTRY_CLI_NO_EXIT_TRAP: unbound variable
This defaults the variable to 0 if it's not set.
_SENTRY_TRACEBACK_FILE="___SENTRY_TRACEBACK_FILE___"
_SENTRY_LOG_FILE="___SENTRY_LOG_FILE___"
-if [ "$SENTRY_CLI_NO_EXIT_TRAP" != 1 ]; then
+if [ "${SENTRY_CLI_NO_EXIT_TRAP-0}" != 1 ]; then
trap _sentry_exit_trap EXIT
fi
trap _sentry_err_trap ERR
