h264: do not return on sidedata allocation failure

Not having allocated it is not a good reason to leave the object
in an undetermined state. Though a particular setting like the
AV_EF_* flags could be useful to control that behaviour.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/h264.c

@@ -835,9 +835,7 @@ static void decode_postinit(H264Context *h, int setup_finished)
         h->content_interpretation_type > 0 &&
         h->content_interpretation_type < 3) {
         AVStereo3D *stereo = av_stereo3d_create_side_data(&cur->f);
-        if (!stereo)
-            return;
-
+        if (stereo) {
         switch (h->frame_packing_arrangement_type) {
         case 0:
             stereo->type = AV_STEREO3D_CHECKERBOARD;
@@ -867,6 +865,7 @@ static void decode_postinit(H264Context *h, int setup_finished)
 
         if (h->content_interpretation_type == 2)
             stereo->flags = AV_STEREO3D_FLAG_INVERT;
+        }
     }
 
     if (h->sei_display_orientation_present &&
@@ -875,12 +874,11 @@ static void decode_postinit(H264Context *h, int setup_finished)
         AVFrameSideData *rotation = av_frame_new_side_data(&cur->f,
                                                            AV_FRAME_DATA_DISPLAYMATRIX,
                                                            sizeof(int32_t) * 9);
-        if (!rotation)
-            return;
-
-        av_display_rotation_set((int32_t *)rotation->data, angle);
-        av_display_matrix_flip((int32_t *)rotation->data,
-                               h->sei_vflip, h->sei_hflip);
+        if (rotation) {
+            av_display_rotation_set((int32_t *)rotation->data, angle);
+            av_display_matrix_flip((int32_t *)rotation->data,
+                                   h->sei_vflip, h->sei_hflip);
+        }
     }
 
     cur->mmco_reset = h->mmco_reset;