Return zero when writing zero bytes
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@ -187,7 +187,7 @@ ssize_t con_write(struct _reent *r,void *fd,const char *ptr, size_t len) {
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int i, count = 0;
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int i, count = 0;
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char *tmp = (char*)ptr;
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char *tmp = (char*)ptr;
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if(!tmp || len<=0) return -1;
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if(!tmp) return -1;
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i = 0;
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i = 0;
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