Fixed the order of the check in the BLOCK_ADJUST() macro so that it also works for libssh2_session_free()
Fixed the order of the check in the BLOCK_ADJUST() macro so that it also works
for libssh2_session_free()

libssh2/libssh2,libssh2/libssh2,libssh2/libssh2,libssh2/libssh2