fpi-byte-writer: Initialize the parent size when initializing with size

libfprint/fpi-byte-writer.c

@@ -76,6 +76,7 @@ fpi_byte_writer_new_with_size (guint size, gboolean fixed)
 
   ret->alloc_size = size;
   ret->parent.data = g_malloc (ret->alloc_size);
+  ret->parent.size = size;
   ret->fixed = fixed;
   ret->owned = TRUE;
 
@@ -143,6 +144,7 @@ fpi_byte_writer_init_with_size (FpiByteWriter * writer, guint size,
   fpi_byte_writer_init (writer);
 
   writer->parent.data = g_malloc (size);
+  writer->parent.size = size;
   writer->alloc_size = size;
   writer->fixed = fixed;
   writer->owned = TRUE;