Vim indentation broken with multiline function calls in struct definitions.

[mahkoh]

Consider the following code:

fn main() {
    let x = X {
        a: 1,
        b: fffff(1,
                 2),
        c: 1,
    };
    let _ = x;
}

Opening a new line while on the c-line puts the cursor here:

    let x = X {
        a: 1,
        b: fffff(1,
                 2),
        c: 1,
                 X
    };

cc @chris-morgan

[mahkoh]

Fixed.