Don't generate spurious warning is security_level not supported

People should not have to worry about the used openssl version
when downgrading security_level.

Author: nikic

ext/openssl/xp_ssl.c

@@ -1711,16 +1711,12 @@ int php_openssl_setup_crypto(php_stream *stream,
 	}
 
 	if (GET_VER_OPT("security_level")) {
-#ifdef HAVE_SEC_LEVEL
 		zend_long lval = zval_get_long(val);
 		if (lval < 0 || lval > 5) {
 			php_error_docref(NULL, E_WARNING, "Security level must be between 0 and 5");
 		}
+#ifdef HAVE_SEC_LEVEL
 		SSL_CTX_set_security_level(sslsock->ctx, lval);
-#else
-		php_error_docref(NULL, E_WARNING,
-				"security_level is not supported by the linked OpenSSL library "
-				"- it is supported from version 1.1.0");
 #endif
 	}