Avoid signed shift

diff --git a/ext/opcache/Optimizer/zend_inference.h b/ext/opcache/Optimizer/zend_inference.h
index 80a58405e799925c9e7a53d654bc2d79d3081bf2..3024583a24a84d43e36c6fbd7f16d7c27b65c2bd 100644 (file)
--- a/ext/opcache/Optimizer/zend_inference.h
+++ b/ext/opcache/Optimizer/zend_inference.h
@@ -30,7 +30,7 @@
 
 //TODO: remome MAY_BE_RC1, MAY_BE_RCN???
 #define MAY_BE_RC1                  (1<<30) /* may be non-reference with refcount == 1 */
-#define MAY_BE_RCN                  (1<<31) /* may be non-reference with refcount > 1  */
+#define MAY_BE_RCN                  (1u<<31) /* may be non-reference with refcount > 1  */
 
 #define MAY_HAVE_DTOR \
        (MAY_BE_OBJECT|MAY_BE_RESOURCE \