Coverity: uninitialized fields in Stitcher

modules/stitching/src/stitcher.cpp

@@ -82,6 +82,11 @@ Stitcher Stitcher::createDefault(bool try_use_gpu)
     stitcher.setExposureCompensator(makePtr<detail::BlocksGainCompensator>());
     stitcher.setBlender(makePtr<detail::MultiBandBlender>(try_use_gpu));
 
+    stitcher.work_scale_ = 1;
+    stitcher.seam_scale_ = 1;
+    stitcher.seam_work_aspect_ = 1;
+    stitcher.warped_image_scale_ = 1;
+
     return stitcher;
 }