minigbm: reduce use of memset

Also run presubmit.sh.

BUG=none
TEST=compile

Change-Id: I6f5d2afca41c4228a4f8eb40f3670b39bce7b641
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/2459529
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Commit-Queue: Gurchetan Singh <gurchetansingh@chromium.org>
diff --git a/dri.c b/dri.c
index 8a85693..dfcfb60 100644
--- a/dri.c
+++ b/dri.c
@@ -71,10 +71,9 @@
  */
 static void close_gem_handle(uint32_t handle, int fd)
 {
-	struct drm_gem_close gem_close;
+	struct drm_gem_close gem_close = { 0 };
 	int ret = 0;
 
-	memset(&gem_close, 0, sizeof(gem_close));
 	gem_close.handle = handle;
 	ret = drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
 	if (ret)