@@ -285,7 +285,7 @@ static void delete_region_display_list(DVBSubContext *ctx, DVBSubRegion *region)

             if (obj_disp) {

                 *obj_disp_ptr = obj_disp->object_list_next;

-                if (object->display_list == NULL) {

+                if (!object->display_list) {

                     obj2 = ctx->object_list;

                     obj2_ptr = &ctx->object_list;

@@ -924,7 +924,7 @@ static void dvbsub_parse_clut_segment(AVCodecContext *avctx,

     clut = get_clut(ctx, clut_id);

-    if (clut == NULL) {

+    if (!clut) {

         clut = av_malloc(sizeof(DVBSubCLUT));

         memcpy(clut, &default_clut, sizeof(DVBSubCLUT));

@@ -1000,7 +1000,7 @@ static void dvbsub_parse_region_segment(AVCodecContext *avctx,

     region = get_region(ctx, region_id);

-    if (region == NULL) {

+    if (!region) {

         region = av_mallocz(sizeof(DVBSubRegion));

         region->id = region_id;

@@ -1064,7 +1064,7 @@ static void dvbsub_parse_region_segment(AVCodecContext *avctx,

         object = get_object(ctx, object_id);

-        if (object == NULL) {

+        if (!object) {

             object = av_mallocz(sizeof(DVBSubObject));

             object->id = object_id;

@@ -1138,7 +1138,7 @@ static void dvbsub_parse_page_segment(AVCodecContext *avctx,

             display = display->next;

         }

-        if (display == NULL)

+        if (!display)

             display = av_mallocz(sizeof(DVBSubRegionDisplay));

         display->region_id = region_id;

@@ -1293,7 +1293,7 @@ static int dvbsub_display_end_segment(AVCodecContext *avctx, uint8_t *buf,

         region = get_region(ctx, display->region_id);

         rect = &sub->rects[i];

-        if (region == NULL)

+        if (!region)

             continue;

         rect->x = display->x_pos;

@@ -1305,7 +1305,7 @@ static int dvbsub_display_end_segment(AVCodecContext *avctx, uint8_t *buf,

         clut = get_clut(ctx, region->clut);

-        if (clut == NULL)

+        if (!clut)

             clut = &default_clut;

         switch (region->depth) {