Simplify PEFile init

WhiskyKit/PE/PortableExecutable.swift

@@ -277,8 +277,8 @@ public struct PEFile: Hashable {
     }
     private let handle: FileHandle
 
-    public init(handle: FileHandle) throws {
-        self.handle = handle
+    public init(url: URL) throws {
+        self.handle = try FileHandle(forReadingFrom: url)
         // Verify it is a PE file by checking for the PE header
         let offsetToPEHeader = handle.extract(UInt32.self, offset: 0x3C) ?? 0
         let peHeader = handle.extract(UInt32.self, offset: Int(offsetToPEHeader))

WhiskyKit/Whisky/Program.swift

@@ -41,7 +41,7 @@ public class Program: Hashable {
         self.settings = ProgramSettings(bottleUrl: bottle.url, name: name)
         self.pinned = bottle.settings.pins.contains(where: { $0.url == url })
         do {
-            self.peFile = try PEFile(handle: FileHandle(forReadingFrom: url))
+            self.peFile = try PEFile(url: url)
         } catch {
             self.peFile = nil
         }

WhiskyThumbnail/ThumbnailProvider.swift

@@ -46,7 +46,7 @@ class ThumbnailProvider: QLThumbnailProvider {
         do {
             var image: NSImage?
 
-            let peFile = try PEFile(handle: try FileHandle(forReadingFrom: request.fileURL))
+            let peFile = try PEFile(url: request.fileURL)
             image = peFile.bestIcon()
 
             let reply: QLThumbnailReply = QLThumbnailReply.init(contextSize: thumbnailSize) { () -> Bool in