Merge commit '04698d52'

* commit '04698d52':
  configure: Use correct variable name in libsnappy test
Merged-by: James Almer <jamrial@gmail.com>

configure

@@ -5819,7 +5819,7 @@ enabled libschroedinger   && require_pkg_config schroedinger-1.0 schroedinger/sc
 enabled libshine          && require_pkg_config shine shine/layer3.h shine_encode_buffer
 enabled libsmbclient      && { use_pkg_config smbclient libsmbclient.h smbc_init ||
                                require smbclient libsmbclient.h smbc_init -lsmbclient; }
-enabled libsnappy         && require snappy snappy-c.h snappy_compress -lsnappy
+enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy
 enabled libsoxr           && require libsoxr soxr.h soxr_create -lsoxr && LIBSOXR="-lsoxr"
 enabled libssh            && require_pkg_config libssh libssh/sftp.h sftp_init
 enabled libspeex          && require_pkg_config speex speex/speex.h speex_decoder_init -lspeex