patched Eigen JacobiaSVD struct declaration to class to stopy compiler griping
patched Eigen JacobiaSVD struct declaration to class to stopy compiler griping

stan-dev/math,stan-dev/math,stan-dev/stan,stan-dev/stan,stan-dev/math,stan-dev/math,stan-dev/stan,stan-dev/math,stan-dev/stan,stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/stan,stan-dev/math