Avoid casting an out-of-range value to long.
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@ -1526,7 +1526,7 @@ z_streamp strm;
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struct inflate_state FAR *state;
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if (strm == Z_NULL || strm->state == Z_NULL)
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return (long)(((unsigned long)0 - 1) << 16);
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return -(1L << 16);
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state = (struct inflate_state FAR *)strm->state;
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return (long)(((unsigned long)((long)state->back)) << 16) +
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(state->mode == COPY ? state->length :
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