Add some debugging output.
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		@@ -207,6 +207,11 @@ static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out,
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		err = deflate(&state->ostream, Z_SYNC_FLUSH);
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	if (err != Z_OK)
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		return -1;
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#ifdef DEBUG_ZLIB
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	fprintf(stderr,"compress(%4d)->%4d %s\n",
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		ilen,olen - state->ostream.avail_out,
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		(ilen != olen - state->ostream.avail_out)?"zlib":"clear");
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#endif
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	return olen - state->ostream.avail_out;
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	}
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@@ -230,6 +235,11 @@ static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out,
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		err = inflate(&state->istream, Z_SYNC_FLUSH);
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	if (err != Z_OK)
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		return -1;
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#ifdef DEBUG_ZLIB
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	fprintf(stderr,"expand(%4d)->%4d %s\n",
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		ilen,olen - state->istream.avail_out,
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		(ilen != olen - state->istream.avail_out)?"zlib":"clear");
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#endif
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	return olen - state->istream.avail_out;
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	}
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