Improved code

src/lib/ee_lib_import_slow_log.sh

@@ -4,6 +4,7 @@ function ee_lib_import_slow_log()
 {
 
 	if [ -d /var/www/22222/htdocs/db/anemometer ]; then
+		if [ -f /var/log/mysql/mysql-slow.log ]; then
 			ee_lib_echo "Importing MySQL slow log, please wait..."
 			dpkg --compare-versions $(pt-query-digest --version | awk '{print $2 }') ge 2.2
 			if [ $? -eq 0 ]; then
@@ -16,6 +17,9 @@ function ee_lib_import_slow_log()
 			--review D=slow_query_log,t=global_query_review \
 			--${ee_anemometer_history} D=slow_query_log,t=global_query_review_history \
 			--no-report --limit=0% --filter=" \$event->{Bytes} = length(\$event->{arg}) and \$event->{hostname}=\"$EE_MYSQL_GRANT_HOST\"" /var/log/mysql/mysql-slow.log
+		else
+			ee_lib_echo_fail "Failed to find MySQL slow log file, enable MySQL slow log"
+		fi
 	else
 		ee_lib_echo_fail "Anememoter is not installed"
 	fi