Minor compilation warning fix.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@4695 92316355-f0b4-4df1-b90c-862c8a59935f

examples/storyboard.c

@@ -133,8 +133,8 @@ int main(int argc, char *argv[])
                                      TWIDTH, THEIGHT, PIX_FMT_RGB32,
                                      SWS_BICUBIC, NULL, NULL, NULL);
 
-            sws_scale(sws, frame->data, frame->linesize, 0, ctx->height,
-                      &start, &pitch);
+            sws_scale(sws, (uint8_t const **)frame->data, frame->linesize, 0,
+                      ctx->height, &start, &pitch);
 
             decorate(start);