Merge pull request #78 from knnniggett/patch-3

Don't check for gnutls-openssl on systems with older gnutls

configure.ac

@@ -277,8 +277,10 @@ fi
 AC_CHECK_HEADERS(gcrypt.h,,AC_MSG_WARN(zm requires libgcrypt headers to be installed for gnutls),)
 AC_CHECK_LIB(gcrypt,gcry_check_version,,AC_MSG_WARN([libgcrypt.a is required for authenticated streaming - use ZM_SSL_LIB option to select openssl instead]))
 AC_CHECK_LIB(gnutls,gnutls_fingerprint,,AC_MSG_WARN([libgnutls.a is required for authenticated streaming - use ZM_SSL_LIB option to select openssl instead]))
+if test "$ZM_HAS_GNUTLS_OPENSSL" == "1"; then
 AC_CHECK_LIB(gnutls-openssl,MD5,,AC_MSG_WARN([libgnutls.a is required for authenticated streaming - use ZM_SSL_LIB option to select openssl instead]))
 fi
+fi
 AC_CHECK_LIB(pcre,pcre_compile,,AC_MSG_WARN(libpcre.a may be required for remote/network camera support))
 AC_CHECK_LIB(z,zlibVersion)
 AC_CHECK_LIB(x264,x264_predict_16x16_init)