fix: call rwb->rhreload() when nblocks > 0
There is no need to call rwb->rhreloade() when nblocks is 0, and some platform(eg: BES) has the limit that the parameter of len in pltatform flash read function cant't be 0.
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@ -352,8 +352,8 @@ static ssize_t rwb_writebuffer(FAR struct rwbuffer_s *rwb,
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padblocks = startblock % rwb->wralignblocks;
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rwb->wrblockstart = startblock - padblocks;
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rwb_read_(rwb, rwb->wrblockstart, padblocks, rwb->wrbuffer);
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rwb->wrnblocks = padblocks;
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rwb_read_(rwb, rwb->wrblockstart, padblocks, rwb->wrbuffer);
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if (remain > rwb->wrmaxblocks - padblocks)
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{
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@ -977,7 +977,10 @@ static ssize_t rwb_read_(FAR struct rwbuffer_s *rwb, off_t startblock,
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* the user buffer.
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*/
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ret = rwb->rhreload(rwb->dev, rdbuffer, startblock, nblocks);
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if (nblocks)
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{
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ret = rwb->rhreload(rwb->dev, rdbuffer, startblock, nblocks);
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}
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}
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return ret;
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