diff --git a/win32port/zlib/inflate.c b/win32port/zlib/inflate.c index 5bec31e2..664c4b9c 100644 --- a/win32port/zlib/inflate.c +++ b/win32port/zlib/inflate.c @@ -1472,9 +1472,10 @@ z_streamp strm; { struct inflate_state FAR *state; - if (strm == Z_NULL || strm->state == Z_NULL) return -1L << 16; - state = (struct inflate_state FAR *)strm->state; - return ((long)(state->back) << 16) + - (state->mode == COPY ? state->length : - (state->mode == MATCH ? state->was - state->length : 0)); + if (strm == Z_NULL || strm->state == Z_NULL) + return (long)(((unsigned long)0 - 1) << 16); + state = (struct inflate_state FAR *)strm->state; + return (long)(((unsigned long)((long)state->back)) << 16) + + (state->mode == COPY ? state->length : + (state->mode == MATCH ? state->was - state->length : 0)); }