libqb: change pause_timestamp to uint64_t

Signed-off-by: Angus Salkeld <asalkeld@redhat.com>
Reviewed-by: Steven Dake <sdake@redhat.com>

exec/totemsrp.c

@@ -499,7 +499,7 @@ struct totemsrp_instance {
 
 	unsigned int my_cbl;
 
-	unsigned long long int pause_timestamp;
+	uint64_t pause_timestamp;
 
 	struct memb_commit_token *commit_token;