Recursive "define" was not detected because "lim" was never

incremented, causing infinite loops.
Fixing CID 1288962.  From christos@ via wiz@, both at NetBSD.

1 files changed, 1 insertions, 0 deletions

diff --git a/eqn.c b/eqn.c
index 1458d791..b84ce7e5 100644
--- a/eqn.c
+++ b/eqn.c
@@ -448,6 +448,7 @@ again:
 		memmove(start + *sz + diff, start + *sz,
 		    (strlen(start) - *sz) + 1);
 		memcpy(start, def->val, def->valsz);
+		lim++;
 		goto again;
 	}