Bug foix

diff --git a/util/ncgg/subr.c b/util/ncgg/subr.c
index 1e50178..eb4f598 100644 (file)
--- a/util/ncgg/subr.c
+++ b/util/ncgg/subr.c
@@ -173,6 +173,7 @@ prophall(n) {
        register i;
        short hallset[SETSIZE];
        
+       if (n < 0) return;
        for(i=0;i<SETSIZE;i++)
                hallset[i] = i<SZOFSET(MAXREGS) ? l_props[n].pr_regset[i] : 0;
        nexthall(hallset);