dc: fix handling of error case for div/mod

NULL is not the right return

diff --git a/Applications/V7/cmd/dc.c b/Applications/V7/cmd/dc.c
index 7459709..47f7b7b 100644 (file)
--- a/Applications/V7/cmd/dc.c
+++ b/Applications/V7/cmd/dc.c
@@ -774,8 +774,8 @@ struct blk *div(struct blk *ddivd, struct blk *ddivr)
        p = salloc(0);
        if (length(ddivr) == 0) {
                pushp(ddivr);
-               /* BUG: this returns NULL, which will cause a crash later */
-               errorrt("divide by 0\n");
+               puts("divide by 0");
+               return 1;
        }
        divsign = remsign = 0;
        divr = ddivr;
@@ -915,8 +915,8 @@ int dscale(void)
        if (sfbeg(dr) == 1 || (sfbeg(dr) == 0 && sbackc(dr) == 0)) {
                sputc(dr, skr);
                pushp(dr);
-               /* BUG: this returns NULL, which will cause a crash later */
-               errorrt("divide by 0\n");
+               puts("divide by 0");
+               return 1;
        }
        c = k - skd + skr;
        if (c < 0)