plug-ins: Fix some problematic Windows functions

The macro should be enough but
on these source files it does not work.

plug-ins/common/file-compressor.c

@@ -81,7 +81,6 @@
 #ifdef _WIN32
 #include <io.h>
 #define close _close
-#define fileno _fileno
 #endif
 
 #include <glib/gstdio.h>
@@ -1097,7 +1096,11 @@ zip_load (GFile *infile,
 
       if (archive_read_next_header (a, &entry) == ARCHIVE_OK)
         {
+#ifndef _WIN32
           r = archive_read_data_into_fd (a, fileno (out));
+#else
+          r = archive_read_data_into_fd (a, _fileno (out));
+#endif
 
           if (r != ARCHIVE_OK)
             {

plug-ins/script-fu/libscriptfu/ftx/ftx.c

@@ -15,7 +15,6 @@
 #endif
 #ifdef _WIN32
 #include <io.h>
-#define unlink _unlink
 #endif
 #include <time.h>
 
@@ -152,7 +151,11 @@ pointer foreign_filedelete(scheme *sc, pointer args)
 
   filename = sc->vptr->string_value(first_arg);
   filename = g_filename_from_utf8 (filename, -1, NULL, NULL, NULL);
+#ifndef _WIN32
   retcode = unlink(filename);
+#else
+  retcode = _unlink(filename);
+#endif
   if (retcode == 0)
     ret = sc->T;
   else