DataFlash: optimize logging climbrate - call function one and reuse result

libraries/DataFlash/LogFile.cpp

@@ -826,6 +826,7 @@ void DataFlash_Class::Log_Write_Baro(AP_Baro &baro, uint64_t time_us)
     if (time_us == 0) {
         time_us = AP_HAL::micros64();
     }
+    float climbrate = baro.get_climb_rate();
     float drift_offset = baro.get_baro_drift_offset();
     struct log_BARO pkt = {
         LOG_PACKET_HEADER_INIT(LOG_BARO_MSG),
@@ -833,7 +834,7 @@ void DataFlash_Class::Log_Write_Baro(AP_Baro &baro, uint64_t time_us)
         altitude      : baro.get_altitude(0),
         pressure      : baro.get_pressure(0),
         temperature   : (int16_t)(baro.get_temperature(0) * 100 + 0.5f),
-        climbrate     : baro.get_climb_rate(),
+        climbrate     : climbrate,
         sample_time_ms: baro.get_last_update(0),
         drift_offset  : drift_offset,
     };
@@ -846,7 +847,7 @@ void DataFlash_Class::Log_Write_Baro(AP_Baro &baro, uint64_t time_us)
             altitude      : baro.get_altitude(1),
             pressure	  : baro.get_pressure(1),
             temperature   : (int16_t)(baro.get_temperature(1) * 100 + 0.5f),
-            climbrate     : baro.get_climb_rate(),
+            climbrate     : climbrate,
             sample_time_ms: baro.get_last_update(1),
             drift_offset  : drift_offset,
         };
@@ -860,7 +861,7 @@ void DataFlash_Class::Log_Write_Baro(AP_Baro &baro, uint64_t time_us)
             altitude      : baro.get_altitude(2),
             pressure	  : baro.get_pressure(2),
             temperature   : (int16_t)(baro.get_temperature(2) * 100 + 0.5f),
-            climbrate     : baro.get_climb_rate(),
+            climbrate     : climbrate,
             sample_time_ms: baro.get_last_update(2),
             drift_offset  : drift_offset,
         };