bivariate Moran scatterplot crashes (time enabled variables)

[lanselin]

Not sure if my crash report made it, but it is not likely to be very informative, since a lot was going on.

The crash happened when invoking randomization on a bivariate Moran scatterplot with time grouped variables, e.g., hhsiz05 and W_hhsiz02 in the NYC example.

This may be an issue with time enabled variables only, since an earlier one with regular variables worked fine.

[lixun910]

v179

[Ashitacarl]

GeoDa 1.12.1.181 (macOS Mojave, 10.14.1). Dec. 10 build.

Fix verified. No crash observed when doing randomization for grouped variables using NYC data. Also tested natregimes data, no crash either.