fix AIS decoding memory leaks

lib/nmea2ktoais/NMEA0183AISMessages.h

@@ -36,7 +36,7 @@ OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <vector>
 #include <string>
 
-#define MAX_SHIP_IN_VECTOR 5
+#define MAX_SHIP_IN_VECTOR 200
 class ship {
 public:
     uint32_t _userID;

lib/nmea2ktoais/NMEA0183AISMsg.h

@@ -49,7 +49,6 @@ typedef std::bitset<BITSET_LENGTH> AISBitSet;
 class tNMEA0183AISMsg : public tNMEA0183Msg {
 
   protected:  // AIS-NMEA
-    AISBitSet bset;
     static const char *EmptyAISField;  // 6bits 0      not used yet.....
     static const char *AsciChar;