Require target side and top edges to be perpendicular

Weird target from the sun wasn't rectangular.  We can reject things that
aren't rectangular ish now, and that fixes it.

Change-Id: Iac1218c0fc1286758ec7602c29ac5c38c24ab831
diff --git a/y2019/vision/debug_viewer.cc b/y2019/vision/debug_viewer.cc
index 3c174b4..9f1d4dd 100644
--- a/y2019/vision/debug_viewer.cc
+++ b/y2019/vision/debug_viewer.cc
@@ -320,11 +320,11 @@
   BlobList imgs_last_;
   ImageFormat fmt_last_;
   bool draw_select_blob_ = false;
-  bool draw_contours_ = false;
-  bool draw_raw_poly_ = false;
+  bool draw_contours_ = true;
+  bool draw_raw_poly_ = true;
   bool draw_components_ = false;
   bool draw_raw_target_ = false;
-  bool draw_raw_IR_ = false;
+  bool draw_raw_IR_ = true;
   bool draw_results_ = true;
 };