Unable to use default 8-byte integer

[mennodeij]

When compiling with -i8 (Intel) | -fdefault-integer-8 (Gnu) [using fix described in #67] many subroutines are ambiguous. It would be nice if the gFTL-shared library worked with the default 64-bit integer, because using the library compiled with default 4-byte integers, in a project where the default integer is 8 bytes leads to the following error on the USE statements with gfortran (Intel does not complain, but I think it should have):

DTIO dummy argument at (1) must be of KIND = 8

which I ascribe to gFTL-shared having been compiled with default 4-byte integers, and the program that uses gFTL-shared being compiled with default 8-byte integers.