fixed undefined signed integer overflow for expression "1 << 31"

[rocksndiamonds.git] / src / main.h

diff --git a/src/main.h b/src/main.h
index c5ff5f8cf2329033ca85c351b3ceae8ffc98b4c0..fd70216dddaa7b7bb6cb586bdf84563be68748c8 100644 (file)
--- a/src/main.h
+++ b/src/main.h
@@ -200,7 +200,7 @@
 #define EP_BITMASK_BASE_DEFAULT                (1 << EP_CAN_MOVE_INTO_ACID)
 #define EP_BITMASK_DEFAULT             0
 
-#define PROPERTY_BIT(p)                        (1 << ((p) % 32))
+#define PROPERTY_BIT(p)                        (1u << ((p) % 32))
 #define PROPERTY_VAR(e,p)              (element_info[e].properties[(p) / 32])
 #define HAS_PROPERTY(e,p)      ((PROPERTY_VAR(e, p) & PROPERTY_BIT(p)) != 0)
 #define SET_PROPERTY(e,p,v)    ((v) ?                                     \