Include the default listen address in the live guest XML

If no 'listen' attribute or <listen> element is set in the
guest XML, the default driver configured listen address is
used. There is no way to client applications to determine
what this address is though. When starting the guest, we
should update the live XML to include this default listen
address

src/qemu/qemu_process.c

@@ -3429,6 +3429,27 @@ int qemuProcessStart(virConnectPtr conn,
                 vm->def->graphics[0]->data.spice.tlsPort = tlsPort;
             }
         }
+
+        if (vm->def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC ||
+            vm->def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_SPICE) {
+            virDomainGraphicsDefPtr graphics = vm->def->graphics[0];
+            if (graphics->nListens == 0) {
+                if (VIR_EXPAND_N(graphics->listens, graphics->nListens, 1) < 0) {
+                    virReportOOMError();
+                    goto cleanup;
+                }
+                graphics->listens[0].type = VIR_DOMAIN_GRAPHICS_LISTEN_TYPE_ADDRESS;
+                if (vm->def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC)
+                    graphics->listens[0].address = strdup(driver->vncListen);
+                else
+                    graphics->listens[0].address = strdup(driver->spiceListen);
+                if (!graphics->listens[0].address) {
+                    VIR_SHRINK_N(graphics->listens, graphics->nListens, 1);
+                    virReportOOMError();
+                    goto cleanup;
+                }
+            }
+        }
     }
 
     if (virFileMakePath(driver->logDir) < 0) {