Make BIT() unsigned int instead of int

This is needed to avoid ubsan warnings on BIT(31).

Signed-off-by: Jouni Malinen <j@w1.fi>

src/utils/common.h

@@ -433,7 +433,7 @@ void perror(const char *s);
 #endif
 
 #ifndef BIT
-#define BIT(x) (1 << (x))
+#define BIT(x) (1U << (x))
 #endif
 
 /*