diff -c3 -r zlib-1.1.3.bak/infblock.c zlib-1.1.3/infblock.c
*** zlib-1.1.3.bak/infblock.c	Mon Jun  8 19:06:16 1998
--- zlib-1.1.3/infblock.c	Sun Oct  6 03:26:40 2002
***************
*** 249,258 ****
                               &s->sub.trees.tb, s->hufts, z);
        if (t != Z_OK)
        {
-         ZFREE(z, s->sub.trees.blens);
          r = t;
!         if (r == Z_DATA_ERROR)
            s->mode = BAD;
          LEAVE
        }
        s->sub.trees.index = 0;
--- 249,259 ----
                               &s->sub.trees.tb, s->hufts, z);
        if (t != Z_OK)
        {
          r = t;
!         if (r == Z_DATA_ERROR) {
!           ZFREE(z, s->sub.trees.blens);
            s->mode = BAD;
+         }
          LEAVE
        }
        s->sub.trees.index = 0;
***************
*** 313,323 ****
          t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
                                    s->sub.trees.blens, &bl, &bd, &tl, &td,
                                    s->hufts, z);
-         ZFREE(z, s->sub.trees.blens);
          if (t != Z_OK)
          {
!           if (t == (uInt)Z_DATA_ERROR)
              s->mode = BAD;
            r = t;
            LEAVE
          }
--- 314,325 ----
          t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
                                    s->sub.trees.blens, &bl, &bd, &tl, &td,
                                    s->hufts, z);
          if (t != Z_OK)
          {
!           if (t == (uInt)Z_DATA_ERROR) {
!             ZFREE(z, s->sub.trees.blens);
              s->mode = BAD;
+           }
            r = t;
            LEAVE
          }
***************
*** 329,334 ****
--- 331,337 ----
          }
          s->sub.decode.codes = c;
        }
+       ZFREE(z, s->sub.trees.blens);
        s->mode = CODES;
      case CODES:
        UPDATE