[Dbmail] dbmail 2.0 RC2 pipe.c

[Chingson Chen]

I found some problem at pipe.c that cannot read "stdin" larger than 512k ..
fixed is the diff below ... 
**************************************************************************************************8
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<   while (!feof(instream) && !myeof)
---
>   while ((!feof(instream) && (!myeof)) || (linemem!=0))
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<           strncpy(strblock, tmpline, linemem);
---
>           strncpy(strblock, tmpline, linemem); usedmem+=linemem;
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<       while (!feof(instream) && usedmem < READ_BLOCK_SIZE)
---
>       while (!feof(instream) && (usedmem+linemem < READ_BLOCK_SIZE))
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>             else
>                     trace(TRACE_ERROR,"test large block.");
>