fix configure

Author: madsodgaard

Samples/SwiftJavaExtractJNISampleApp/build.gradle

@@ -103,7 +103,7 @@ def jextract = tasks.register("jextract", Exec) {
     workingDir = layout.projectDirectory
     commandLine "swift"
     // TODO: -v for debugging build issues...
-    args("build", "-v") // since Swift targets which need to be jextract-ed have the jextract build plugin, we just need to build
+    args("build") // since Swift targets which need to be jextract-ed have the jextract build plugin, we just need to build
     // If we wanted to execute a specific subcommand, we can like this:
     //     args("run",/*
     //             "swift-java", "jextract",

Sources/SwiftJavaTool/Commands/JExtractCommand.swift

@@ -95,7 +95,6 @@ extension SwiftJava.JExtractCommand {
     let writeEmptyFiles = CommandLine.arguments.contains("--write-empty-files") ? true : nil
     configure(&config.writeEmptyFiles, overrideWith: writeEmptyFiles)
 
-    config.writeEmptyFiles = writeEmptyFiles
     configure(&config.unsignedNumbersMode, overrideWith: self.unsignedNumbersMode)
     configure(&config.minimumInputAccessLevelMode, overrideWith: self.minimumInputAccessLevelMode)
     configure(&config.memoryManagementMode, overrideWith: self.memoryManagementMode)
@@ -134,7 +133,7 @@ extension SwiftJava.JExtractCommand {
     }
   }
 
-  func configure<T>(_ setting: inout T, overrideWith value: T?) {
+  func configure<T>(_ setting: inout T?, overrideWith value: T?) {
     if let value {
       setting = value
     }