tracker-udp: prevent read past end of buffer

Can happen with incorrect .ini values.

1 files changed, 4 insertions, 1 deletions

diff --git a/ftnoir_tracker_udp/ftnoir_tracker_udp.cpp b/ftnoir_tracker_udp/ftnoir_tracker_udp.cpp
index bc42f402..f03e75aa 100644..100755
--- a/ftnoir_tracker_udp/ftnoir_tracker_udp.cpp
+++ b/ftnoir_tracker_udp/ftnoir_tracker_udp.cpp
@@ -59,7 +59,10 @@ void FTNoIR_Tracker::data(double *data)
     };
     
     for (int i = 0; i < 3; i++)
-        data[Yaw + i] += values[indices[i]];
+    {
+        int k = std::min<unsigned>(sizeof(values)/sizeof(values[0]), std::max(0, indices[i]));
+        data[Yaw + i] += values[k];
+    }
 }