vppinfra: fix typo in tw_timer_template.c

Fix minor memory leak

Type: fix
Ticket: VPP-1833
Fixes: 4af9ba1dab

Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: Id10fba70471ca78f73f14146054f6b12c5d4431f
diff --git a/src/vppinfra/tw_timer_template.c b/src/vppinfra/tw_timer_template.c
index 9ad7462..07e300f 100644
--- a/src/vppinfra/tw_timer_template.c
+++ b/src/vppinfra/tw_timer_template.c
@@ -476,7 +476,7 @@
 	}
     }
 
-#if TW_OVERFLOW_VECVOR > 0
+#if TW_OVERFLOW_VECTOR > 0
   ts = &tw->overflow;
   head = pool_elt_at_index (tw->timers, ts->head_index);
   next_index = head->next;