Branch (not main) :  MCM331.inc

Cannot have two switch cases with the same condition.

```
 26     CASE(135)
 27       j(  15) = seval(szabin,theta,tmp,tmp2,b,c,d) ! n-C3H7CHO -> n-C3H7 + CHO
 28     CASE(135)
 29       j(  16) = seval(szabin,theta,tmp,tmp2,b,c,d) ! n-C3H7CHO -> C2H4 + CH2CHOH
```

I see this was fixed in #b1c3aee66e  but that does not appear to be usable for some reason. 