From 703a1ba438231e71bb5a5db621fabaf4acd9af70 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Sun, 5 May 2013 15:02:51 +1000
Subject: [PATCH] Copter: avoid copying the DCM matrix

---
 ArduCopter/test.pde | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ArduCopter/test.pde b/ArduCopter/test.pde
index 3804fbe1ae..75ac025c35 100644
--- a/ArduCopter/test.pde
+++ b/ArduCopter/test.pde
@@ -475,7 +475,7 @@ test_mag(uint8_t argc, const Menu::arg *argv)
             if(medium_loopCounter == 5) {
                 if (compass.read()) {
                     // Calculate heading
-                    Matrix3f m = ahrs.get_dcm_matrix();
+                    const Matrix3f &m = ahrs.get_dcm_matrix();
                     heading = compass.calculate_heading(m);
                     compass.null_offsets();
                 }