err when an address contains a sum $a+$b (afl)

Reported by Alessandro Mantovani.
These addresses are likely bogus, but
they triggered an unwarranted assertion
failure. We now raise a civilized error.

1 files changed, 1 insertions, 1 deletions

diff --git a/all.h b/all.h
index 7f843a9..4b9eb0e 100644
--- a/all.h
+++ b/all.h
@@ -433,7 +433,7 @@ int phicls(int, Tmp *);
 Ref newtmp(char *, int, Fn *);
 void chuse(Ref, int, Fn *);
 Ref getcon(int64_t, Fn *);
-void addcon(Con *, Con *);
+int addcon(Con *, Con *);
 void blit(Ref, uint, Ref, uint, Fn *);
 void dumpts(BSet *, Tmp *, FILE *);