add null checking

Change-Id: I60beab517611977ca946ee6d469b11be710e32c6
Signed-off-by: Junkyeong Kim <jk0430.kim@samsung.com>

diff --git a/src/tdm_display.c b/src/tdm_display.c
index c44130b..b61bed5 100644 (file)
--- a/src/tdm_display.c
+++ b/src/tdm_display.c
@@ -1557,7 +1557,8 @@ tdm_layer_get_displaying_buffer(tdm_layer *layer, tdm_error *error)
        if (private_layer->showing_buffer) {
                buffer = private_layer->showing_buffer;
        } else {
-               *error = TDM_ERROR_OPERATION_FAILED;
+               if (error)
+                       *error = TDM_ERROR_OPERATION_FAILED;
                _pthread_mutex_unlock(&private_display->lock);
                TDM_ERR("layer(%p) showing_buffer is null",
                        private_layer);