Fixed literal value in csp_endian.c
Fixed literal value in csp_endian.c

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