Return NULL from g_mapped_file_get_contents()

In the case of an empty file, return NULL instead of "".  This means
that the return result of g_mapped_file_get_contents() will always be
page-aligned.

1 files changed, 5 insertions, 0 deletions

diff --git a/README.in b/README.in
index 52707f7dd..94a3c2a6b 100644
--- a/README.in
+++ b/README.in
@@ -39,6 +39,11 @@ Notes about GLib 2.24
   while an object is being initialized. If this behavior is needed, setting a
   custom constructor that just chains up will re-enable this functionality.
 
+* GMappedFile on an empty file now returns NULL for the contents instead of
+  returning an empty string. The documentation specifically states that code
+  may not rely on nul-termination here so any breakage caused by this change
+  is a bug in application code.
+
 Notes about GLib 2.22
 =====================