Obvious copy and paste bug.

I think this may fix the intel flredecomp bug for the cx1 tests, as I get the following 
backtrace (only for non-debugging build):
gdb) bt
#0  0x0000000000659f0b in state_module_mp_aliased_scalar_ ()
#1  0x000000000050950c in checkpoint_mp_checkpoint_fields_ ()
#2  0x00000000005072cb in checkpoint_mp_checkpoint_state_ ()
#3  0x0000000000507116 in checkpoint_mp_checkpoint_simulation_ ()
#4  0x0000000000503c5e in flredecomp ()
#5  0x000000000050419b in main ()