fix: prevent sql error when updating to admidio 5.0 and no changelog table is present

Author: MightyMCoder

system/common.php

@@ -232,7 +232,20 @@
 
 // update session recordset (i.a. refresh timestamp)
 $gCurrentSession->setValue('ses_reload', 0);
-$gCurrentSession->save();
+if ($gCurrentSession->isNewRecord()) {
+    // check if logging table exists
+    $sql = 'SELECT * FROM ' . TBL_LOG . ' LIMIT 1';
+    try {
+        $gDb->query($sql);
+    } catch (Throwable $e) {
+        //temporary disable logging
+        $gCurrentSession->setLoggingEnabled(false);
+        $gCurrentSession->save();
+        $gCurrentSession->setLoggingEnabled(true);
+    }
+} else {
+    $gCurrentSession->save();
+}
 
 // create the necessary objects and parameters