AP_Baro - change data type size of temperature's average filter to int32_t (was int16_t)

libraries/AP_Baro/AP_Baro_BMP085.h

@@ -38,7 +38,7 @@ class AP_Baro_BMP085 : public AP_Baro
 	int16_t ac1, ac2, ac3, b1, b2, mb, mc, md;
     uint16_t ac4, ac5, ac6;
 
-	AverageFilterInt16_Size4 _temp_filter;
+	AverageFilterInt32_Size4 _temp_filter;
 
     uint32_t _retry_time;