Fix for PHP version 7.2 (#121)

Author: remicollet

.travis.yml

@@ -6,6 +6,8 @@ language: php
 
 php:
   - 7.0
+  - 7.1
+  - nightly
 
 python:
   - 2.7

src/php_tarantool.h

@@ -17,7 +17,10 @@
 #  include "config.h"
 #endif
 
-#if PHP_VERSION_ID >= 70000
+#if PHP_VERSION_ID >= 70200
+#  include <Zend/zend_smart_string.h>
+#  define smart_string_alloc4(d, n, what, newlen) newlen = smart_string_alloc(d, n, what)
+#elif PHP_VERSION_ID >= 70000
 #  include <ext/standard/php_smart_string.h>
 #else
 #  include <ext/standard/php_smart_str.h>