Some minor issues

Not sure if these are typos, but there are a few lines that do nothing:

In OGOPTI, the first line does nothing since MAX is immediately set to 0:

```fortran
    MAX = -1D10
    MAX = 0D0
```

and in OGCORR, a number is multiplied by 1:

```fortran
    SCA = VARMAX * 1D-0
```

same issue in OGEXEC:

```fortran
     VARMAX = VARMAX * 10D-1
```