Don't add an empty MESSAGE_DATA(key) header if it doesn't already exist.

Doing Set(MESSAGE_DATA(key)=) would add an empty key header if the key
header did not already exist.  If it already existed it would delete it.

* Made msg_set_var_full() exit early if the named variable did not already
exist and the value to set is empty.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/10@361522 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/message.c b/main/message.c
index c4d2c43724f7c60ee2359483bff69b4da6423eeb..ae76f256fa7e25932e8c0e72345641b38e3ef6a6 100644 (file)
--- a/main/message.c
+++ b/main/message.c
@@ -494,6 +494,9 @@ static int msg_set_var_full(struct ast_msg *msg, const char *name, const char *v
        struct msg_data *data;
 
        if (!(data = msg_data_find(msg->vars, name))) {
+               if (ast_strlen_zero(value)) {
+                       return 0;
+               }
                if (!(data = msg_data_alloc())) {
                        return -1;
                };