VIGS: add NULL checks when screen capturing

- root_sfc may be NULL
- pixels buffer may be NULL

Change-Id: Icc7a4d2ca486bc08273da3158b823e9c4c090592
Signed-off-by: Vasiliy Ulyanov <v.ulyanov@samsung.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/hw/vigs/vigs_onscreen_server.c b/hw/vigs/vigs_onscreen_server.c
index 4c51c17678..8a06219b26 100644
--- a/hw/vigs/vigs_onscreen_server.c
+++ b/hw/vigs/vigs_onscreen_server.c
@@ -43,12 +43,15 @@ static void vigs_onscreen_server_capture_work(struct work_queue_item *wq_item)
 {
     struct vigs_capture_work_item *item = (struct vigs_capture_work_item*)wq_item;
     struct vigs_onscreen_server *server = item->server;
+    struct vigs_surface *root_sfc = server->base.root_sfc;
+    bool captured = false;
     uint32_t width, height;
-    bool captured;
     void *pixels;
 
     pixels = vigs_server_get_capture_buffer(&server->base, &width, &height);
-    captured = server->base.backend->capture(server->base.root_sfc, pixels);
+    if (root_sfc && pixels) {
+        captured = server->base.backend->capture(root_sfc, pixels);
+    }
     server->capture_ops->process_captured(captured, pixels, width, height);
 
     g_free(item);