Stream: use ngx_pcalloc() in ngx_stream_proxy_bind().

src/stream/ngx_stream_proxy_module.c

diff --git a/src/stream/ngx_stream_proxy_module.c b/src/stream/ngx_stream_proxy_module.c
index 8c37d00..0c330f4 100644
--- a/src/stream/ngx_stream_proxy_module.c
+++ b/src/stream/ngx_stream_proxy_module.c
@@ -1713,7 +1713,7 @@
         return NGX_CONF_OK;
     }
 
-    local = ngx_palloc(cf->pool, sizeof(ngx_stream_upstream_local_t));
+    local = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_local_t));
     if (local == NULL) {
         return NGX_CONF_ERROR;
     }