#449 lzma2407: kIfinityPrice

[Sam Tansy]

In lzma2407/CS/7zip/Compress/LZMA/LzmaEncoder.cs' there is this definitionconst UInt32 kIfinityPrice = 0xFFFFFFF;`. For sake of orthography, there is no such word as 'Ifinity'. I guess it's misspelled, hence this patch.