Small fix to remove C++ compile errors.

[artgillespie]

A friend ran into these compiler errors tonight:

../asihttprequest/ASIDataDecompressor.m: In function 'NSData* -[ASIDataDecompressor uncompressBytes:length:error:](ASIDataDecompressor*, objc_selector*, Bytef*, NSUInteger, NSError**)':
../asihttprequest/ASIDataDecompressor.m:89: error: pointer of type 'void *' used in arithmetic
../asihttprequest/ASIDataDecompressor.m:89: error: pointer of type 'void *' used in arithmetic
../asihttprequest/ASIDataDecompressor.m:89: error: invalid conversion from 'void*' to 'Bytef*'
../asihttprequest/ASIDataDecompressor.m: In function 'BOOL +[ASIDataDecompressor uncompressDataFromFile:toFile:error:](objc_object*, objc_selector*, NSString*, NSString*, NSError**)':
../asihttprequest/ASIDataDecompressor.m:192: error: invalid conversion from 'const void*' to 'const uint8_t*'

I looked around and found a few people had the same error, but that noone had found the answer[1]. It turns out this happens if ASIDataCompressor.m is compiled with the objective-c++ flag, which can happen if the file type is set to Objective-C++ or if the project or target is set to compile all obj-c files as objective-c++.

It's a tiny change to ASIDataCompressor.m to eliminate these compiler errors: Just cast two void * returns from [NSData bytes] to Bytef * and const uint8_t *

[1] http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=ASIDataCompressor+pointer+arithmetic

[pokeb]

Many thanks! :)