Add sanity checking.

src/video_output/vout_subpictures.c

@@ -296,6 +296,7 @@ subpicture_region_t *__spu_MakeRegion( vlc_object_t *p_this,
                                        picture_t *p_pic )
 {
     subpicture_region_t *p_region = malloc( sizeof(subpicture_region_t) );
+    if( !p_region ) return NULL;
     memset( p_region, 0, sizeof(subpicture_region_t) );
     p_region->p_next = 0;
     p_region->p_cache = 0;
@@ -1071,6 +1072,8 @@ static void sub_del_buffer( filter_t *p_filter, subpicture_t *p_subpic )
 static subpicture_t *spu_new_buffer( filter_t *p_filter )
 {
     subpicture_t *p_subpic = (subpicture_t *)malloc(sizeof(subpicture_t));
+    if( !p_subpic ) return NULL;
+
     memset( p_subpic, 0, sizeof(subpicture_t) );
     p_subpic->b_absolute = VLC_TRUE;
 
@@ -1096,6 +1099,7 @@ static void spu_del_buffer( filter_t *p_filter, subpicture_t *p_subpic )
 static picture_t *spu_new_video_buffer( filter_t *p_filter )
 {
     picture_t *p_picture = malloc( sizeof(picture_t) );
+    if( !p_picture ) return NULL;
 
     if( vout_AllocatePicture( p_filter, p_picture,
                               p_filter->fmt_out.video.i_chroma,