UseSynthesizedInitializer warns even if init has non-standard attributes attached

[dnadoba]

struct Foo {
    var bar: Int

    @inlinable // warning: [UseSynthesizedInitializer] remove initializer and use the synthesized initializer
    init(bar: Int) {
        self.bar = bar
    }
}

@inlinable is required or otherwise it can't be used in other @inlinable code. Therefore this should not warn as it is not equivalent to the synthesised init.

[allevato]

Will be fixed by #592.

[dnadoba]

Very impressive report to fix time I must say! Thanks a lot again @allevato! Very appreciated