[base] Initialize stream memory earlier.

With Windows memory management tracking heap, it is important to use
it during the stream opening fallback. In Unix, the argument is
unused, but it is better to set it correctly.

* src/base/ftobjs.c (FT_Stream_New): Set memory before calling
`FT_Stream_Open`.
* builds/windows/ftsystem.c, builds/unix/ftsystem.c (FT_Stream_Open,
ft_close_stream_by_free): Call `ft_alloc` and `ft_free` with proper
memory argumment.

builds/unix/ftsystem.c

@@ -233,7 +233,7 @@
   FT_CALLBACK_DEF( void )
   ft_close_stream_by_free( FT_Stream  stream )
   {
-    ft_free( NULL, stream->descriptor.pointer );
+    ft_free( stream->memory, stream->descriptor.pointer );
 
     stream->descriptor.pointer = NULL;
     stream->size               = 0;
@@ -324,7 +324,7 @@
       FT_ERROR(( "FT_Stream_Open:" ));
       FT_ERROR(( " could not `mmap' file `%s'\n", filepathname ));
 
-      stream->base = (unsigned char*)ft_alloc( NULL, stream->size );
+      stream->base = (unsigned char*)ft_alloc( stream->memory, stream->size );
 
       if ( !stream->base )
       {
@@ -374,7 +374,7 @@
     return FT_Err_Ok;
 
   Fail_Read:
-    ft_free( NULL, stream->base );
+    ft_free( stream->memory, stream->base );
 
   Fail_Map:
     close( file );

builds/windows/ftsystem.c

@@ -188,7 +188,7 @@
   FT_CALLBACK_DEF( void )
   ft_close_stream_by_free( FT_Stream  stream )
   {
-    ft_free( NULL, stream->descriptor.pointer );
+    ft_free( stream->memory, stream->descriptor.pointer );
 
     stream->descriptor.pointer = NULL;
     stream->size               = 0;
@@ -323,7 +323,7 @@
       FT_ERROR(( "FT_Stream_Open:" ));
       FT_ERROR(( " could not `mmap' file `%s'\n", filepathname ));
 
-      stream->base = (unsigned char*)ft_alloc( NULL, stream->size );
+      stream->base = (unsigned char*)ft_alloc( stream->memory, stream->size );
 
       if ( !stream->base )
       {
@@ -369,7 +369,7 @@
     return FT_Err_Ok;
 
   Fail_Read:
-    ft_free( NULL, stream->base );
+    ft_free( stream->memory, stream->base );
 
   Fail_Open:
     CloseHandle( file );

src/base/ftobjs.c

@@ -221,6 +221,7 @@
       FT_Stream_OpenMemory( stream,
                             (const FT_Byte*)args->memory_base,
                             (FT_ULong)args->memory_size );
+      stream->memory = memory;
     }
 
 #ifndef FT_CONFIG_OPTION_DISABLE_STREAM_SUPPORT
@@ -231,6 +232,7 @@
       if ( FT_NEW( stream ) )
         goto Exit;
 
+      stream->memory = memory;
       error = FT_Stream_Open( stream, args->pathname );
       if ( error )
         FT_FREE( stream );
@@ -241,8 +243,9 @@
 
       /* in this case, we do not need to allocate a new stream object */
       /* since the caller is responsible for closing it himself       */
-      stream = args->stream;
-      error  = FT_Err_Ok;
+      stream         = args->stream;
+      stream->memory = memory;
+      error          = FT_Err_Ok;
     }
 
 #endif
@@ -255,10 +258,7 @@
     }
 
     if ( !error )
-    {
-      stream->memory = memory;
       *astream       = stream;
-    }
 
   Exit:
     return error;