Removed minor warnings under minGW
diff --git a/programs/zstdcli.c b/programs/zstdcli.c
index 9c47845..5876f55 100644
--- a/programs/zstdcli.c
+++ b/programs/zstdcli.c
@@ -54,7 +54,7 @@
 #  include <fcntl.h>    // _O_BINARY
 #  include <io.h>       // _setmode, _isatty
 #  ifdef __MINGW32__
-   int _fileno(FILE *stream);   // MINGW somehow forgets to include this windows declaration into <stdio.h>
+   /* int _fileno(FILE *stream);   // seems no longer useful // MINGW somehow forgets to include this windows declaration into <stdio.h> */
 #  endif
 #  define SET_BINARY_MODE(file) _setmode(_fileno(file), _O_BINARY)
 #  define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
@@ -65,9 +65,9 @@
 #endif
 
 
-//****************************
-// Constants
-//****************************
+/**************************************
+*  Constants
+**************************************/
 #define COMPRESSOR_NAME "zstd command line interface"
 #ifndef ZSTD_VERSION
 #  define ZSTD_VERSION "v0.0.1"