OSCUDPSocket: Input sanitizing for port number and inline docs updated for clarity

Author: orchetect

Sources/OSCKit/UDP/Socket/OSCUDPSocket.swift

@@ -59,7 +59,7 @@ public final class OSCUDPSocket {
     /// manufacturer.
     public var remotePort: UInt16 {
         get { _remotePort ?? localPort }
-        set { _remotePort = newValue }
+        set { _remotePort = (newValue == 0) ? nil : newValue }
     }
     private var _remotePort: UInt16?
 
@@ -99,10 +99,10 @@ public final class OSCUDPSocket {
     ///
     /// - Parameters:
     ///   - localPort: Local port to listen on for inbound OSC packets.
-    ///     If `nil`, a random available port in the system will be chosen.
+    ///     If `nil` or `0`, a random available port in the system will be chosen.
     ///   - remoteHost: Remote hostname or IP address.
     ///   - remotePort: Remote port on the remote host machine to send outbound OSC packets to.
-    ///     If `nil`, the `localPort` value will be used.
+    ///     If `nil` or `0`, the `localPort` value will be used.
     ///   - interface: Optionally specify a network interface for which to constrain communication.
     ///   - timeTagMode: OSC time-tag mode. The default is recommended.
     ///   - isIPv4BroadcastEnabled: Enable sending IPv4 broadcast messages from the socket.
@@ -121,8 +121,8 @@ public final class OSCUDPSocket {
         receiveHandler: OSCHandlerBlock? = nil
     ) {
         self.remoteHost = remoteHost
-        _localPort = localPort
-        _remotePort = remotePort
+        _localPort = (localPort == nil || localPort == 0) ? nil : localPort
+        _remotePort = (remotePort == nil || remotePort == 0) ? nil : remotePort
         self.interface = interface
         self.timeTagMode = timeTagMode
         self.isIPv4BroadcastEnabled = isIPv4BroadcastEnabled