AP_GPS: avoid some float conversion warnings

libraries/AP_GPS/AP_GPS_NMEA.cpp

@@ -227,7 +227,7 @@ uint32_t AP_GPS_NMEA::_parse_degrees()
     }
     ret = (deg * (int32_t)10000000UL);
     ret += (min * (int32_t)10000000UL / 60);
-    ret += (int32_t) (frac_min * (1.0e7 / 60.0f));
+    ret += (int32_t) (frac_min * (1.0e7f / 60.0f));
     return ret;
 }
 

libraries/AP_GPS/AP_GPS_SBP.cpp

@@ -891,7 +891,7 @@ AP_GPS_SBP::logging_log_baseline_ecef(struct sbp_baseline_ecef_t* b)
     float x = b->x / 1000.0;
     float y = b->y / 1000.0;
     float z = b->z / 1000.0;
-    int32_t len = (int32_t) (safe_sqrt(x*x+y*y+z*z) * 1000.0);
+    int32_t len = (int32_t) (safe_sqrt(x*x+y*y+z*z) * 1000.0f);
 
     struct log_SbpBaseline pkt = {
         LOG_PACKET_HEADER_INIT(LOG_MSG_SBPBASELINE),