The CODE block in get_cols passed the addresses of two 4GL INTEGERs to
int A4GLSQL_next_column(char** colname, int* dtype, int* size);
A 4GL INTEGER is a long, so on a 64-bit platform the callee filled four bytes
of each eight-byte variable and left the rest as it found it. That worked only
because both happened to be zero when it ran, and gcc 14 rejects it outright:
error: passing argument 2 of 'A4GLSQL_next_column' from incompatible
pointer type
The values are now taken in ints and copied across, which is what the API
describes.
