These headers are global.

(cherry picked from commit 29cec84c)
Signed-off-by: Rémi Duraffort <ivoire@videolan.org>

modules/video_filter/mosaic.c

@@ -36,8 +36,8 @@
 #include <math.h>
 #include <limits.h> /* INT_MAX */
 
-#include "vlc_filter.h"
-#include "vlc_image.h"
+#include <vlc_filter.h>
+#include <vlc_image.h>
 
 #include "mosaic.h"