[unique] message: Fix signedness of set() length parameter

[Emmanuele Bassi <ebassi src gnome org>]

commit b9fba9f38913cf717e11277b3948f9c4effc2f8f
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Sun Mar 27 09:43:05 2011 +0100

    message: Fix signedness of set() length parameter
    
    Since we accept -1 as a valid value for unique_message_data_set(), we need
    to use gssize and not gsize. We also need to clamp the stored value to 0 in
    case of negative values, as other parts of the code expect that.

 unique/uniquemessage.c |    6 +++---
 unique/uniquemessage.h |    2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/unique/uniquemessage.c b/unique/uniquemessage.c
index 262d9fb..a938029 100644
--- a/unique/uniquemessage.c
+++ b/unique/uniquemessage.c
@@ -133,7 +133,7 @@ unique_message_data_free (UniqueMessageData *message_data)
 /**
  * unique_message_data_set:
  * @message_data: a #UniqueMessageData
- * @data: binary blob to set, or %NULL
+ * @data: (allow-none): binary blob to set, or %NULL
  * @length: length of @data
  *
  * Sets @data as the payload of @message_data. Any other data is removed
@@ -146,7 +146,7 @@ unique_message_data_free (UniqueMessageData *message_data)
 void
 unique_message_data_set (UniqueMessageData *message_data,
                          const guchar      *data,
-                         gsize              length)
+                         gssize             length)
 {
   g_return_if_fail (message_data != NULL);
 
@@ -168,7 +168,7 @@ unique_message_data_set (UniqueMessageData *message_data,
         message_data->data = (guchar *) g_strdup ("");
     }
 
-  message_data->length = length;
+  message_data->length = length >= 0 ? length : 0;
 }
 
 /**
diff --git a/unique/uniquemessage.h b/unique/uniquemessage.h
index d3e9c3c..b862d43 100644
--- a/unique/uniquemessage.h
+++ b/unique/uniquemessage.h
@@ -47,7 +47,7 @@ void                   unique_message_data_free           (UniqueMessageData *me
 
 void                   unique_message_data_set            (UniqueMessageData *message_data,
                                                            const guchar      *data,
-                                                           gsize              length);
+                                                           gssize             length);
 G_CONST_RETURN guchar *unique_message_data_get            (UniqueMessageData *message_data,
                                                            gsize             *length);