[seed] make seed_value_from_string return "null" if passed "NULL"

[Tim Horton <hortont src gnome org>]

commit 9cf4a15d929007c9dfdb3c1a1fea6d03825b8614
Author: Iain Nicol <iain thenicols net>
Date:   Fri Oct 30 22:08:51 2009 +0000

    make seed_value_from_string return "null" if passed "NULL"

 libseed/seed-types.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)
---
diff --git a/libseed/seed-types.c b/libseed/seed-types.c
index 7995993..5452e04 100644
--- a/libseed/seed-types.c
+++ b/libseed/seed-types.c
@@ -2021,11 +2021,16 @@ JSValueRef
 seed_value_from_string (JSContextRef ctx,
 			const gchar * val, JSValueRef * exception)
 {
-  JSStringRef jsstr = JSStringCreateWithUTF8CString (val);
-  JSValueRef valstr = JSValueMakeString (ctx, jsstr);
-  JSStringRelease (jsstr);
+  if (val == NULL)
+    return JSValueMakeNull (ctx);
+  else
+    {
+      JSStringRef jsstr = JSStringCreateWithUTF8CString (val);
+      JSValueRef valstr = JSValueMakeString (ctx, jsstr);
+      JSStringRelease (jsstr);
 
-  return valstr;
+      return valstr;
+    }
 }
 
 /**