shithub: puzzles

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Just noticed a longhand shuffling operation which I must have missed
when I converted them all into calls to shuffle().

[originally from svn r6404]

--- a/net.c

+++ b/net.c

@@ -897,14 +897,7 @@

     perim2 = snewn(nperim, struct xyd);

     memcpy(perim2, perimeter, nperim * sizeof(struct xyd));

     /* Shuffle the perimeter, so as to search it without directional bias. */

-    for (i = nperim; --i ;) {

-	int j = random_upto(rs, i+1);

-	struct xyd t;

-

-	t = perim2[j];

-	perim2[j] = perim2[i];

-	perim2[i] = t;

-    }

+    shuffle(perim2, nperim, sizeof(*perim2), rs);

     for (i = 0; i < nperim; i++) {

 	int x2, y2;