Fix incorrect ownership of processing algorithm dialog

(cherry picked from commit 013082d)

Author: nyalldawson

python/gui/auto_generated/processing/qgsprocessingalgorithmdialogbase.sip.in

@@ -34,7 +34,7 @@ Base class for processing algorithm dialogs.
       FormatHtml,
     };
 
-    QgsProcessingAlgorithmDialogBase( QWidget *parent = 0, Qt::WindowFlags flags = 0 );
+    QgsProcessingAlgorithmDialogBase( QWidget *parent /TransferThis/ = 0, Qt::WindowFlags flags = 0 );
 %Docstring
 Constructor for QgsProcessingAlgorithmDialogBase.
 %End

src/gui/processing/qgsprocessingalgorithmdialogbase.h

@@ -98,7 +98,7 @@ class GUI_EXPORT QgsProcessingAlgorithmDialogBase : public QDialog, private Ui::
     /**
      * Constructor for QgsProcessingAlgorithmDialogBase.
      */
-    QgsProcessingAlgorithmDialogBase( QWidget *parent = nullptr, Qt::WindowFlags flags = nullptr );
+    QgsProcessingAlgorithmDialogBase( QWidget *parent SIP_TRANSFERTHIS = nullptr, Qt::WindowFlags flags = nullptr );
 
     /**
      * Sets the \a algorithm to run in the dialog.