From 1398b5dd201a69d4c769adce4bf4eabb5e3a28fa Mon Sep 17 00:00:00 2001
From: Joshua Allen <axlecrusher@gmail.com>
Date: Sat, 8 Apr 2017 17:40:56 -0400
Subject: don't paint 0 coordinates

---
 calibrate.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/calibrate.c b/calibrate.c
index 71bdcab..67c1d27 100644
--- a/calibrate.c
+++ b/calibrate.c
@@ -138,6 +138,9 @@ void * GuiThread( void * v )
 //					g = (g * (5-buffertimeto[i][nn])) / 5 ;
 //					b = (b * (5-buffertimeto[i][nn])) / 5 ;
 					CNFGColor( (b<<16) | (g<<8) | r );
+
+					if (bufferpts[i*2+0][nn] == 0 || bufferpts[i*2+1][nn]==0) continue; //do not draw if aither coordinate is 0
+
 					CNFGTackRectangle( bufferpts[i*2+0][nn], bufferpts[i*2+1][nn], bufferpts[i*2+0][nn] + 5, bufferpts[i*2+1][nn] + 5 );
 					CNFGPenX = bufferpts[i*2+0][nn]; CNFGPenY = bufferpts[i*2+1][nn];
 					CNFGDrawText( buffermts, 2 );
-- 
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