fix crash on open/create file

that was caused by commit ccce1da .
Now it doesn't crash and fix for autobrush dimensions still works.

krita/plugins/paintops/libbrush/kis_auto_brush.cpp

@@ -66,11 +66,11 @@ KisAutoBrush::KisAutoBrush(KisMaskGenerator* as, qreal angle, qreal randomness,
     d->density = density;
     d->idealThreadCountCached = QThread::idealThreadCount();
     setBrushType(MASK);
+    setWidth(qMax(qreal(1.0), d->shape->width()));
+    setHeight(qMax(qreal(1.0), d->shape->height()));
     QImage image = createBrushPreview();
     setImage(image);
     setBrushTipImage(image);
-    setWidth(qMax(qreal(1.0), d->shape->width()));
-    setHeight(qMax(qreal(1.0), d->shape->height()));
     setAngle(angle);
 }