Copter: nuke clang warnings

ArduCopter/Attitude.cpp

@@ -28,7 +28,7 @@ void Copter::update_throttle_hover()
 
     // calc average throttle if we are in a level hover.  accounts for heli hover roll trim
     if (throttle > 0.0f && fabsf(inertial_nav.get_velocity_z_up_cms()) < 60 &&
-        labs(ahrs.roll_sensor-attitude_control->get_roll_trim_cd()) < 500 && labs(ahrs.pitch_sensor) < 500) {
+        fabsf(ahrs.roll_sensor-attitude_control->get_roll_trim_cd()) < 500 && labs(ahrs.pitch_sensor) < 500) {
         // Can we set the time constant automatically
         motors->update_throttle_hover(0.01f);
 #if HAL_GYROFFT_ENABLED

ArduCopter/mode_auto.cpp

@@ -1980,7 +1980,7 @@ bool ModeAuto::verify_circle(const AP_Mission::Mission_Command& cmd)
     }
 
     // check if we have completed circling
-    return fabsf(copter.circle_nav->get_angle_total()/M_2PI) >= LOWBYTE(cmd.p1);
+    return fabsf(copter.circle_nav->get_angle_total()/float(M_2PI)) >= LOWBYTE(cmd.p1);
 }
 
 // verify_spline_wp - check if we have reached the next way point using spline

ArduCopter/mode_guided.cpp

@@ -684,7 +684,7 @@ void ModeGuided::pos_control_run()
 
     float pos_offset_z_buffer = 0.0; // Vertical buffer size in m
     if (guided_pos_terrain_alt) {
-        pos_offset_z_buffer = MIN(copter.wp_nav->get_terrain_margin() * 100.0, 0.5 * fabsf(guided_pos_target_cm.z));
+        pos_offset_z_buffer = MIN(copter.wp_nav->get_terrain_margin() * 100.0, 0.5 * fabsF(guided_pos_target_cm.z));
     }
     pos_control->input_pos_xyz(guided_pos_target_cm, terr_offset, pos_offset_z_buffer);