Rover: fixed logging build errors

APMrover2/APMrover2.pde

@@ -536,7 +536,7 @@ static int32_t 	perf_mon_timer;
 // The maximum main loop execution time recorded in the current performance monitoring interval
 static int16_t 	G_Dt_max = 0;
 // The number of gps fixes recorded in the current performance monitoring interval
-static int16_t 	gps_fix_count = 0;
+static uint8_t 	gps_fix_count = 0;
 // A variable used by developers to track performanc metrics.
 // Currently used to record the number of GCS heartbeat messages received
 static int16_t pmTest1 = 0;

APMrover2/Log.pde

@@ -600,8 +600,8 @@ static void Log_Write_Current()
     struct log_Current pkt = {
         LOG_PACKET_HEADER_INIT(LOG_CURRENT_MSG),
         throttle_in             : g.channel_throttle.control_in,
-        battery_voltage         : (int16_t)battery_voltage1 * 100.0,
-        current_amps            : (int16_t)current_amps1 * 100.0,
+        battery_voltage         : (int16_t)(battery_voltage1 * 100.0),
+        current_amps            : (int16_t)(current_amps1 * 100.0),
         current_total           : (int16_t)current_total1
     };
     DataFlash.WriteBlock(&pkt, sizeof(pkt));