[llvm] r280345 - [Support] Fix a warning introduced in r280339 due to the member

[George Rimar via llvm-commits]

>[Support] Fix a warning introduced in r280339 due to the member
>initializers not being in the same order as the members.
>
>Specifically, 'preg' is the first member followed by 'error', so they
>will be initialized in that order and should be written in the member
>initializer list in that order.
>
>For the constructor in question, there is no change in behavior.

Thanks !
Did not know about this warning.

George.