Copter: minor formatting fix to ekf failsafe check

ArduCopter/ekf_check.cpp

@@ -100,13 +100,13 @@ bool Copter::ekf_over_threshold()
     Vector2f offset;
     ahrs.get_variances(vel_variance, position_variance, height_variance, mag_variance, tas_variance, offset);
 
-    // return true if two of compass, velocity and position variances are over the threshold
+    // return true if two of compass, velocity and position variances are over the threshold OR velocity variance is twice the threshold
     uint8_t over_thresh_count = 0;
     if (mag_variance.length() >= g.fs_ekf_thresh) {
         over_thresh_count++;
     }
     if (vel_variance >= (2.0f * g.fs_ekf_thresh)) {
-        over_thresh_count+=2;
+        over_thresh_count += 2;
     } else if (vel_variance >= g.fs_ekf_thresh) {
         over_thresh_count++;
     }