fix: code compile compatibility with old macos

- .zero in Int/Int32/UInt32 is missing here

alt-tab-macos/logic/CoreGraphicsApis.swift

@@ -6,7 +6,7 @@ class CoreGraphicsApis {
         return (CGWindowListCopyWindowInfo([.excludeDesktopElements, .optionOnScreenOnly], kCGNullWindowID) as! [NSDictionary])
                 .filter {
             // workaround: filtering this criteria seems to remove non-windows UI elements
-            let isWindowNotMenubarOrOthers = value($0, kCGWindowLayer, Int.zero) == 0
+            let isWindowNotMenubarOrOthers = value($0, kCGWindowLayer, Int(0)) == 0
             let windowBounds = CGRect(dictionaryRepresentation: value($0, kCGWindowBounds, [:] as CFDictionary))!
             // workaround: some apps like chrome use a window to implement the search popover
             let isReasonablyBig = windowBounds.width > Preferences.minimumWindowSize && windowBounds.height > Preferences.minimumWindowSize

alt-tab-macos/logic/SystemPermissions.swift

@@ -14,7 +14,7 @@ class SystemPermissions {
 
     static func ensureScreenRecordingCheckboxIsChecked() {
         let firstWindow = CoreGraphicsApis.windows()[0]
-        let windowNumber = CoreGraphicsApis.value(firstWindow, kCGWindowNumber, CGWindowID.zero)
+        let windowNumber = CoreGraphicsApis.value(firstWindow, kCGWindowNumber, UInt32(0))
         if CoreGraphicsApis.image(windowNumber) == nil {
             debugPrint("Before using this app, you need to give permission in System Preferences > Security & Privacy > Privacy > Screen Recording.",
                     "Please authorize and re-launch.",

alt-tab-macos/ui/Application.swift

@@ -74,10 +74,10 @@ class Application: NSApplication, NSApplicationDelegate, NSWindowDelegate {
         // we rely on the fact that CG and AX APIs arrays follow the same order to match objects from both APIs
         var pidAndCurrentIndex: [pid_t: Int] = [:]
         for cgWindow in CoreGraphicsApis.windows() {
-            let cgId = CoreGraphicsApis.value(cgWindow, kCGWindowNumber, CGWindowID.zero)
+            let cgId = CoreGraphicsApis.value(cgWindow, kCGWindowNumber, UInt32(0))
             let cgTitle = CoreGraphicsApis.value(cgWindow, kCGWindowName, "")
             let cgOwnerName = CoreGraphicsApis.value(cgWindow, kCGWindowOwnerName, "")
-            let cgOwnerPid = CoreGraphicsApis.value(cgWindow, kCGWindowOwnerPID, pid_t.zero)
+            let cgOwnerPid = CoreGraphicsApis.value(cgWindow, kCGWindowOwnerPID, Int32(0))
             let i = pidAndCurrentIndex.index(forKey: cgOwnerPid)
             pidAndCurrentIndex[cgOwnerPid] = (i == nil ? 0 : pidAndCurrentIndex[i!].value + 1)
             let axWindows_ = AccessibilityApis.windows(cgOwnerPid)