Move mstime_t define outside sentinel.c.

The define is now used in other parts of Redis 2.8 tree instead of long
long.

A nice side effect is that now 2.8 and unstable sentinel.c files are
identical as it should be.

src/redis.h

@@ -368,6 +368,8 @@
  * Data types
  *----------------------------------------------------------------------------*/
 
+typedef long long mstime_t; /* millisecond time type. */
+
 /* A redis object, that is a type able to hold a string / list / set */
 
 /* The actual Redis Object */

src/sentinel.c

@@ -44,8 +44,6 @@ extern char **environ;
 
 /* ======================== Sentinel global state =========================== */
 
-typedef long long mstime_t; /* millisecond time type. */
-
 /* Address object, used to describe an ip:port pair. */
 typedef struct sentinelAddr {
     char *ip;