Mapper: don't use C-style prototypes

src/Mapper.cxx

@@ -59,7 +59,8 @@ mapper_init(AllocatedPath &&_playlist_dir)
 		mapper_set_playlist_dir(std::move(_playlist_dir));
 }
 
-void mapper_finish(void)
+void
+mapper_finish()
 {
 }
 
@@ -109,7 +110,7 @@ map_fs_to_utf8(Path path_fs)
 #endif
 
 const AllocatedPath &
-map_spl_path(void)
+map_spl_path()
 {
 	return playlist_dir_fs;
 }

src/fs/io/FileOutputStream.hxx

@@ -97,7 +97,8 @@ protected:
 
 #ifdef WIN32
 	bool SeekEOF() {
-		return SetFilePointer(handle, 0, nullptr, FILE_END);
+		return SetFilePointer(handle, 0, nullptr,
+				      FILE_END) != 0xffffffff;
 	}
 #endif