Update DB\IO dbWriteDataExt to allow null primary key

So we do not get an error on a new data call with a null primary key

www/lib/CoreLibs/DB/Extended/ArrayIO.php

@@ -198,7 +198,7 @@ class ArrayIO extends \CoreLibs\DB\IO
 	public function dbCheckPkSet(): bool
 	{
 		// if pk_id is set, overrule ...
-		if ($this->pk_id) {
+		if (!empty($this->pk_id)) {
 			$this->table_array[$this->pk_name]['value'] = $this->pk_id;
 		}
 		// if not set ... produce error

www/lib/CoreLibs/DB/IO.php

@@ -3232,7 +3232,7 @@ class IO
 	 *
 	 * @param  array<mixed> $write_array     list of elements to write
 	 * @param  array<mixed> $not_write_array list of elements not to write
-	 * @param  int          $primary_key     id key to decide if we write insert or update
+	 * @param  int|null     $primary_key     id key to decide if we write insert or update
 	 * @param  string       $table           name for the target table
 	 * @param  array<mixed> $data            data array to override _POST data
 	 * @return int|false                     primary key
@@ -3240,7 +3240,7 @@ class IO
 	public function dbWriteData(
 		array $write_array,
 		array $not_write_array,
-		int $primary_key,
+		?int $primary_key,
 		string $table,
 		array $data = []
 	): int|false {
@@ -3260,19 +3260,19 @@ class IO
 	 * PARAM INFO: $primary key
 	 * this can be a plain string/int and will be internal transformed into the array form
 	 * or it takes the array form of array [row => column, value => pk value]
-	 * @param  array<mixed>            $write_array     list of elements to write
-	 * @param  int|string|array<mixed> $primary_key     primary key string or array set
-	 * @param  string                  $table           name for the target table
-	 * @param  array<mixed>            $not_write_array list of elements not to write (optional)
-	 * @param  array<mixed>            $not_write_update_array list of elements not
-	 *                                                         to write during update (optional)
-	 * @param  array<mixed>            $data            optional array with data
-	 *                                                  if not _POST vars are used
-	 * @return int|false                                primary key
+	 * @param  array<mixed>                 $write_array     list of elements to write
+	 * @param  null|int|string|array<mixed> $primary_key     primary key string or array set
+	 * @param  string                       $table           name for the target table
+	 * @param  array<mixed>                 $not_write_array list of elements not to write (optional)
+	 * @param  array<mixed>                 $not_write_update_array list of elements not
+	 *                                                       to write during update (optional)
+	 * @param  array<mixed>                 $data            optional array with data
+	 *                                                       if not _POST vars are used
+	 * @return int|false                                     primary key
 	 */
 	public function dbWriteDataExt(
 		array $write_array,
-		int|string|array $primary_key,
+		null|int|string|array $primary_key,
 		string $table,
 		array $not_write_array = [],
 		array $not_write_update_array = [],