Crashes if number of orbitals exceeds ca. 256

[mkrompiec]

@conodp could you please enter the description of the error/limitation Basis size nbas, 1-electron integral table size NInte1 and ERI table size two_el_size should be integer(8), not integer(4). Moreover, the dimension of eig was incorrect.

[conodp]

For large number of orbitals calculations of 2-electron size index gave an overflow due to low integer precision assign to the variable. Also, the mismatch between size declaration of arrays in two different subroutines threw the 'malloc(): unsupported double linked list corrupted' error

[mkrompiec]

BTW, these issues weren't present in the original GAMMCOR code but were introduced by me when converting to f90.