Pulse audio backend doesn't work in  v4.0.0-rc4 release

Using Gentoo linux, build from source: qemu v4.0.0-rc4 release (eeba63fc7fface36f438bcbc0d3b02e7dcb59983)

Pulse audio backend doesn't initialize because of the:
audio/paaudio.c:
-    if (!popts->has_server) {
-        char pidfile[64];
-        char *runtime;
-        struct stat st;
-
-        runtime = getenv("XDG_RUNTIME_DIR");
-        if (!runtime) {
-            return NULL;
-        }
-        snprintf(pidfile, sizeof(pidfile), "%s/pulse/pid", runtime);
-        if (stat(pidfile, &st) != 0) {
-            return NULL;
-        }
-    }
XDG_RUNTIME_DIR is not set for me. There is no /run/user directory exist in my system.

Also:
$ less ~/.pulse/client.conf  
default-server = unix:/home/ivan/.pulse_server