rdp: fix bug in retransmissions
rdp: fix bug in retransmissions

kubostech/KubOS,satlab/libcsp,Psykar/kubos,Psykar/kubos,GomSpace/libcsp,Psykar/kubos,kubostech/KubOS,Psykar/kubos,pacheco017/libcsp,libcsp/libcsp,GomSpace/libcsp,satlab/libcsp,Psykar/kubos,Psykar/kubos,libcsp/libcsp,pacheco017/libcsp,GomSpace/libcsp,pacheco017/libcsp,satlab/libcsp,pacheco017/libcsp,Psykar/kubos