Prevent to open a FT_Stream for zero-sized file on non-Unix.

builds/unix/ftsystem.c prevents to open an useless stream from
zero-sized file and returns FT_Err_Cannot_Open_Stream, but the
stream drivers for ANSI C, Amiga and VMS return useless streams.
For cross-platform consistency, all stream drivers should act
same.

* src/base/ftsystem.c (FT_Stream_Open): If the size of the opened
file is zero, FT_Err_Cannot_Open_Stream is returned.
* builds/amiga/src/base/ftsystem.c (FT_Stream_Open): Ditto.
* src/vms/ftsystem.c (FT_Stream_Open): Ditto.

1 files changed, 8 insertions, 0 deletions

diff --git a/builds/amiga/src/base/ftsystem.c b/builds/amiga/src/base/ftsystem.c
index 016f1e29e..a2619886e 100644
--- a/builds/amiga/src/base/ftsystem.c
+++ b/builds/amiga/src/base/ftsystem.c
@@ -442,6 +442,14 @@ Free_VecPooled( APTR  poolHeader,
     stream->read  = ft_amiga_stream_io;
     stream->close = ft_amiga_stream_close;
 
+    if ( !stream->size )
+    {
+      ft_amiga_stream_close( stream );
+      FT_ERROR(( "FT_Stream_Open:" ));
+      FT_ERROR(( " opened `%s' but zero-sized\n", filepathname ));
+      return FT_Err_Cannot_Open_Stream;;
+    }
+
     FT_TRACE1(( "FT_Stream_Open:" ));
     FT_TRACE1(( " opened `%s' (%ld bytes) successfully\n",
                 filepathname, stream->size ));