Avoid undefined behavior

diff --git a/Zend/zend_operators.h b/Zend/zend_operators.h
index 1ca1c7751cd5bb7f4d415a511c2a93d14b6642b5..c5f4ae84a80241c0fb865f52d0c9f58702787694 100644 (file)
--- a/Zend/zend_operators.h
+++ b/Zend/zend_operators.h
@@ -35,7 +35,7 @@
 #include "zend_multiply.h"
 #include "zend_object_handlers.h"
 
-#define LONG_SIGN_MASK (((zend_long)1) << (8*sizeof(zend_long)-1))
+#define LONG_SIGN_MASK ZEND_LONG_MIN
 
 BEGIN_EXTERN_C()
 ZEND_API int ZEND_FASTCALL add_function(zval *result, zval *op1, zval *op2);