shithub: puzzles

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Make newgame_undo_buf 'char *', not 'void *'.

This fixes a compile error under -pedantic at the point where we do
pointer arithmetic on it.

--- a/midend.c

+++ b/midend.c

@@ -63,7 +63,7 @@

     int nstates, statesize, statepos;

     struct midend_state_entry *states;

-    void *newgame_undo_buf;

+    char *newgame_undo_buf;

     int newgame_undo_len, newgame_undo_size;

     game_params *params, *curparams;