lavc/libschroedinger: add missing failure checks in ff_create_schro_frame()

libavcodec/libschroedinger.c

@@ -189,7 +189,10 @@ SchroFrame *ff_create_schro_frame(AVCodecContext *avccontext,
     uv_height = y_height >> (SCHRO_FRAME_FORMAT_V_SHIFT(schro_frame_fmt));
 
     p_pic = av_mallocz(sizeof(AVPicture));
-    avpicture_alloc(p_pic, avccontext->pix_fmt, y_width, y_height);
+    if (!p_pic || avpicture_alloc(p_pic, avccontext->pix_fmt, y_width, y_height) < 0) {
+        av_free(p_pic);
+        return NULL;
+    }
 
     p_frame         = schro_frame_new();
     p_frame->format = schro_frame_fmt;