add parens when bit and arith ops are mixed in macros in public headers

another commit to silence gcc warnings (-Wparentheses) for standard headers.
changed macros: LOG_UPTO, IN6_ARE_ADDR_EQUAL

include/netinet/in.h

@@ -149,7 +149,7 @@ uint16_t ntohs(uint16_t);
         (IN6_IS_ADDR_MULTICAST(a) && ((((uint8_t *) (a))[1] & 0xf) == 0xe))
 
 #define __ARE_4_EQUAL(a,b) \
-	(!( 0[a]-0[b] | 1[a]-1[b] | 2[a]-2[b] | 3[a]-3[b] ))
+	(!( (0[a]-0[b]) | (1[a]-1[b]) | (2[a]-2[b]) | (3[a]-3[b]) ))
 #define IN6_ARE_ADDR_EQUAL(a,b) \
 	__ARE_4_EQUAL((const uint32_t *)(a), (const uint32_t *)(b))
 

include/syslog.h

@@ -21,7 +21,7 @@ extern "C" {
 #define	LOG_MAKEPRI(f, p) (((f)<<3)|(p))
 
 #define LOG_MASK(p) (1<<(p))
-#define LOG_UPTO(p) ((1<<(p)+1)-1)
+#define LOG_UPTO(p) ((1<<((p)+1))-1)
 
 #define LOG_KERN     (0<<3)
 #define LOG_USER     (1<<3)