Wrong definition of dim in get_warm_start_mgd

[Yibinjiang]

dim in "get_warm_start_mgd" is defined as dim = len(source_solutions[0]). Since source_solutions[0] is tuple, this dim is always 2. I'm assuming dim = len(source_solutions[0][0]), otherwise get_warm_start_mgd won't work for higher dimensional data.

[c-bata]

Good catch!! You are completely correct. I fixed this bug at #98.

[c-bata]

I published v0.8.2 for this bugfix. Thank you for reporting!
https://github.com/CyberAgent/cmaes/releases/tag/v0.8.2