avoid shifting signed integers 31 bits

diff --git a/cache.h b/cache.h
index 6f53962bf25b350fe9118328fb6bfa34d1aa3810..908884318cadd239b8b7acb153727e366e69348c 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -214,7 +214,7 @@ struct cache_entry {
 #define CE_INTENT_TO_ADD     (1 << 29)
 #define CE_SKIP_WORKTREE     (1 << 30)
 /* CE_EXTENDED2 is for future extension */
-#define CE_EXTENDED2         (1 << 31)
+#define CE_EXTENDED2         (1U << 31)
 
 #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE)