Be sure to not consider prefix on variable updates (bug #5444)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6818 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 9 insertions, 2 deletions

diff --git a/pbx.c b/pbx.c
index d8747d572..da7d5be60 100755
--- a/pbx.c
+++ b/pbx.c
@@ -5885,15 +5885,22 @@ void pbx_builtin_setvar_helper(struct ast_channel *chan, const char *name, const
 {
 	struct ast_var_t *newvariable;
 	struct varshead *headp;
-
+	const char *nametail = name;
 
 	if (name[strlen(name)-1] == ')')
 		return ast_func_write(chan, name, value);
 
 	headp = (chan) ? &chan->varshead : &globals;
 
+	/* For comparison purposes, we have to strip leading underscores */
+	if (*nametail == '_') {
+		nametail++;
+		if (*nametail == '_') 
+			nametail++;
+	}
+
 	AST_LIST_TRAVERSE (headp, newvariable, entries) {
-		if (strcasecmp(ast_var_name(newvariable), name) == 0) {
+		if (strcasecmp(ast_var_name(newvariable), nametail) == 0) {
 			/* there is already such a variable, delete it */
 			AST_LIST_REMOVE(headp, newvariable, entries);
 			ast_var_delete(newvariable);