hwclock: fix sizeof bug (used it on pointer, not array); make --systohc exact

function                                             old     new   delta
hwclock_main                                         329     428     +99
rtc_adjtime_is_utc                                   138     134      -4
edir                                                 365     354     -11
read_rtc                                              39      23     -16
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 99/-31)             Total: 68 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/tc.c b/networking/tc.c
index 3115a52..dbdba33 100644
--- a/networking/tc.c
+++ b/networking/tc.c
@@ -191,8 +191,8 @@
 	struct tc_cbq_wrropt *wrr = NULL;
 	struct tc_cbq_fopt *fopt = NULL;
 	struct tc_cbq_ovl *ovl = NULL;
-	const char * const error = "CBQ: too short %s opt";
-	RESERVE_CONFIG_BUFFER(buf, 64);
+	const char *const error = "CBQ: too short %s opt";
+	char buf[64];
 
 	if (opt == NULL)
 		goto done;
@@ -272,7 +272,6 @@
 		}
 	}
  done:
-	RELEASE_CONFIG_BUFFER(buf);
 	return 0;
 }