Update syno_hdd_db.sh

v3.5.93
- Bug fix for false "Failed to delete tmp files" log entries. Issue #312
  - Bug first appeared in v3.1.64

syno_hdd_db.sh

@@ -49,7 +49,7 @@
 # /var/packages/StorageManager/target/ui/storage_panel.js
 
 
-scriptver="v3.5.92"
+scriptver="v3.5.93"
 script=Synology_HDD_db
 repo="007revad/Synology_HDD_db"
 scriptname=syno_hdd_db
@@ -388,7 +388,7 @@ cleanup_tmp(){
     fi
 
     # Add warning to DSM log
-    if [[ -z $cleanup_err ]]; then
+    if [[ $cleanup_err ]]; then
         syslog_set warn "$script update failed to delete tmp files"
     fi
 }