fixed compilation warnings with gcc 4.6.0.

Author: agentzh

src/ngx_postgres_processor.c

@@ -116,11 +116,8 @@ ngx_int_t
 ngx_postgres_upstream_connect(ngx_http_request_t *r, ngx_connection_t *pgxc,
     ngx_postgres_upstream_peer_data_t *pgdt)
 {
-    ngx_http_upstream_t        *u;
     PostgresPollingStatusType   pgrc;
 
-    u = r->upstream;
-
     pgrc = PQconnectPoll(pgdt->pgconn);
 
     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pgxc->log, 0,

valgrind.suppress

@@ -1,3 +1,19 @@
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Param
+   epoll_ctl(event)
+   fun:epoll_ctl
+   fun:ngx_epoll_add_event
+}
+{
+   <insert_a_suppression_name_here>
+   Memcheck:Leak
+   fun:malloc
+   fun:ngx_alloc
+   fun:ngx_event_process_init
+   fun:ngx_single_process_cycle
+   fun:(below main)
+}
 {
    <insert_a_suppression_name_here>
    Memcheck:Leak