[4.1] da727cb Reset storage_malloc counter on allocation failure.

[Lasse Karstensen]

commit da727cb9c4889a5575e7cce37d31deaadc99ed3b
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Fri Jan 8 09:53:40 2016 +0000

    Reset storage_malloc counter on allocation failure.
    
    Submitted by:	github::onovy

diff --git a/bin/varnishd/storage/storage_malloc.c b/bin/varnishd/storage/storage_malloc.c
index 87b634f..23d7012 100644
--- a/bin/varnishd/storage/storage_malloc.c
+++ b/bin/varnishd/storage/storage_malloc.c
@@ -106,6 +106,7 @@ sma_alloc(const struct stevedore *st, size_t size)
 		 * XXX: Not want to pick up the lock twice just for stats.
 		 */
 		sma_sc->stats->c_fail++;
+		sma_sc->sma_alloc -= size;
 		sma_sc->stats->c_bytes -= size;
 		sma_sc->stats->g_alloc--;
 		sma_sc->stats->g_bytes -= size;