Syntax Error in file "src/common/algebra.hpp"

[CagyFrancis]

The return value should not be void. The following is the fixed version.

401 template
402 inline ProjectiveMatrix<2, T>inverseof(const ProjectiveMatrix<2, T>& M) {
403 ProjectiveMatrix<2, T> N(M);
404 invert(N);
405 return N;
406 }