Fixed a few warnings.

Rev: src/modules/Pipe/pipe.c:1.39
Rev: src/modules/_Charset/charsetmod.c:1.23
Rev: src/modules/_Charset/iso2022.c:1.17
Rev: src/modules/_Crypto/crypto.c:1.36
Rev: src/modules/files/file.c:1.184
Rev: src/modules/spider/spider.c:1.96
Rev: src/modules/spider/xml.c:1.25