AP_GPS: Remove unneeded intilizers

saves 160 bytes on make px4-v2

libraries/AP_GPS/AP_GPS_ERB.cpp

@@ -34,13 +34,6 @@ extern const AP_HAL::HAL& hal;
 
 AP_GPS_ERB::AP_GPS_ERB(AP_GPS &_gps, AP_GPS::GPS_State &_state, AP_HAL::UARTDriver *_port) :
     AP_GPS_Backend(_gps, _state, _port),
-    _step(0),
-    _msg_id(0),
-    _payload_length(0),
-    _payload_counter(0),
-    _fix_count(0),
-    _new_position(0),
-    _new_speed(0),
     next_fix(AP_GPS::NO_FIX)
 {
 }

libraries/AP_GPS/AP_GPS_MAV.cpp

@@ -22,7 +22,6 @@
 AP_GPS_MAV::AP_GPS_MAV(AP_GPS &_gps, AP_GPS::GPS_State &_state, AP_HAL::UARTDriver *_port) :
     AP_GPS_Backend(_gps, _state, _port)
 {
-    _new_data = false;
 }
 
 // Reading does nothing in this class; we simply return whether or not

libraries/AP_GPS/AP_GPS_NMEA.cpp

@@ -51,13 +51,7 @@ extern const AP_HAL::HAL& hal;
 #define hexdigit(x) ((x)>9?'A'+((x)-10):'0'+(x))
 
 AP_GPS_NMEA::AP_GPS_NMEA(AP_GPS &_gps, AP_GPS::GPS_State &_state, AP_HAL::UARTDriver *_port) :
-    AP_GPS_Backend(_gps, _state, _port),
-    _parity(0),
-    _is_checksum_term(false),
-    _sentence_type(0),
-    _term_number(0),
-    _term_offset(0),
-    _gps_data_good(false)
+    AP_GPS_Backend(_gps, _state, _port)
 {
     // this guarantees that _term is always nul terminated
     memset(_term, 0, sizeof(_term));

libraries/AP_GPS/AP_GPS_NOVA.cpp

@@ -40,9 +40,7 @@ do {                                            \
 
 AP_GPS_NOVA::AP_GPS_NOVA(AP_GPS &_gps, AP_GPS::GPS_State &_state,
                        AP_HAL::UARTDriver *_port) :
-    AP_GPS_Backend(_gps, _state, _port),
-    _new_position(0),
-    _new_speed(0)
+    AP_GPS_Backend(_gps, _state, _port)
 {
     nova_msg.nova_state = nova_msg_parser::PREAMBLE1;
 

libraries/AP_GPS/AP_GPS_SBP.cpp

@@ -46,13 +46,7 @@ do {                                            \
 
 AP_GPS_SBP::AP_GPS_SBP(AP_GPS &_gps, AP_GPS::GPS_State &_state,
                        AP_HAL::UARTDriver *_port) :
-    AP_GPS_Backend(_gps, _state, _port),
-
-    last_injected_data_ms(0),
-    last_iar_num_hypotheses(0),
-    last_full_update_tow(0),
-    last_full_update_cpu_ms(0),
-    crc_error_counter(0)
+    AP_GPS_Backend(_gps, _state, _port)
 {
 
     Debug("SBP Driver Initialized");

libraries/AP_GPS/AP_GPS_SIRF.cpp

@@ -33,12 +33,7 @@ const uint8_t AP_GPS_SIRF::_initialisation_blob[] = {
 };
 
 AP_GPS_SIRF::AP_GPS_SIRF(AP_GPS &_gps, AP_GPS::GPS_State &_state, AP_HAL::UARTDriver *_port) :
-    AP_GPS_Backend(_gps, _state, _port),
-    _step(0),
-    _gather(false),
-    _payload_length(0),
-    _payload_counter(0),
-    _msg_id(0)
+    AP_GPS_Backend(_gps, _state, _port)
 {
     gps.send_blob_start(state.instance, (const char *)_initialisation_blob, sizeof(_initialisation_blob));
 }

libraries/AP_GPS/AP_GPS_UAVCAN.cpp

@@ -31,7 +31,6 @@ extern const AP_HAL::HAL& hal;
 AP_GPS_UAVCAN::AP_GPS_UAVCAN(AP_GPS &_gps, AP_GPS::GPS_State &_state, AP_HAL::UARTDriver *_port) :
     AP_GPS_Backend(_gps, _state, _port)
 {
-    _new_data = false;
     _sem_gnss = hal.util->new_semaphore();
 }
 

libraries/AP_GPS/AP_GPS_UBLOX.cpp

@@ -45,28 +45,12 @@ extern const AP_HAL::HAL& hal;
 
 AP_GPS_UBLOX::AP_GPS_UBLOX(AP_GPS &_gps, AP_GPS::GPS_State &_state, AP_HAL::UARTDriver *_port) :
     AP_GPS_Backend(_gps, _state, _port),
-    _step(0),
-    _msg_id(0),
-    _payload_length(0),
-    _payload_counter(0),
-    _class(0),
-    _cfg_saved(false),
-    _last_cfg_sent_time(0),
-    _num_cfg_save_tries(0),
-    _last_config_time(0),
-    _delay_time(0),
     _next_message(STEP_PVT),
     _ublox_port(255),
-    _have_version(false),
     _unconfigured_messages(CONFIG_ALL),
     _hardware_generation(UBLOX_UNKNOWN_HARDWARE_GENERATION),
-    _new_position(0),
-    _new_speed(0),
-    _disable_counter(0),
     next_fix(AP_GPS::NO_FIX),
-    _cfg_needs_save(false),
-    noReceivedHdop(true),
-    havePvtMsg(false)
+    noReceivedHdop(true)
 {
     // stop any config strings that are pending
     gps.send_blob_start(state.instance, nullptr, 0);