X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=sgt-puzzles.git;a=blobdiff_plain;f=blackbox.c;fp=blackbox.c;h=d92af92f2a81c0a4cc6234d9c4de214799e5a8da;hp=829aaec4b67632db5db28ae6a4344558c54e008b;hb=a58c1b216bb1d4547f7b2ef2703fe2d0cd3b5cac;hpb=3276376d1be74b66970b88c3e941dcedf8d22474

diff --git a/blackbox.c b/blackbox.c
index 829aaec..d92af92 100644
--- a/blackbox.c
+++ b/blackbox.c
@@ -251,7 +251,7 @@ static const char *validate_desc(const game_params *params, const char *desc)
 {
     int nballs, dlen = strlen(desc), i;
     unsigned char *bmp;
-    char *ret;
+    const char *ret;
 
     /* the bitmap is 2+(nballs*2) long; the hex version is double that. */
     nballs = ((dlen/2)-2)/2;