Results 26 issues of chennqqi

https://github.com/nwaples/rardecode/blob/e2fa07408d4b19ae0500efbcc6983863c95f821e/ppm_model.go#L805 panic: runtime error: index out of range [256] with length 256

1. Build Compatible with C++(-Wall -Werror) windows _MSC_VER >= 1600(VS2010 C++11 add decltype) clang(support but not test) gcc(tested gcc>=4.0.0) 2. Add test code

gcc: 无法识别的选项‘-single_module’