Fix up GIO docs

gio/win32/gwinhttpfile.c

@@ -79,13 +79,13 @@ g_winhttp_file_init (GWinHttpFile *winhttp)
 {
 }
 
-/**
+/*
  * _g_winhttp_file_new:
  * @vfs: GWinHttpVfs to use
  * @uri: URI of the GWinHttpFile to create.
  *
  * Returns: new winhttp #GFile.
- **/
+ */
 GFile *
 _g_winhttp_file_new (GWinHttpVfs *vfs,
                      const char  *uri)

gio/win32/gwinhttpfileinputstream.c

@@ -96,14 +96,14 @@ g_winhttp_file_input_stream_init (GWinHttpFileInputStream *info)
 {
 }
 
-/**
+/*
  * g_winhttp_file_input_stream_new:
  * @file: the GWinHttpFile being read
  * @connection: handle to the HTTP connection, as from WinHttpConnect()
  * @request: handle to the HTTP request, as from WinHttpOpenRequest
  *
  * Returns: #GFileInputStream for the given request
- **/
+ */
 GFileInputStream *
 _g_winhttp_file_input_stream_new (GWinHttpFile *file,
                                   HINTERNET     connection,

gio/win32/gwinhttpfileoutputstream.c

@@ -85,14 +85,14 @@ g_winhttp_file_output_stream_init (GWinHttpFileOutputStream *info)
 {
 }
 
-/**
+/*
  * g_winhttp_file_output_stream_new:
  * @file: the GWinHttpFile being read
  * @connection: handle to the HTTP connection, as from WinHttpConnect()
  * @request: handle to the HTTP request, as from WinHttpOpenRequest
  *
  * Returns: #GFileOutputStream for the given request
- **/
+ */
 GFileOutputStream *
 _g_winhttp_file_output_stream_new (GWinHttpFile *file,
                                    HINTERNET     connection)

gio/win32/gwinhttpvfs.c

@@ -130,7 +130,7 @@ g_winhttp_vfs_init (GWinHttpVfs *vfs)
      0);
 }
 
-/**
+/*
  * g_winhttp_vfs_new:
  *
  * Returns a new #GVfs handle for a WinHttp vfs.