If the leading underscore is not stripped before comparison,

pbx_builtin_getvar_helper() will never find the associated variable.
(Bug 7892)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@42638 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -16314,7 +16314,8 @@ static int sip_addheader(struct ast_channel *chan, void *data)
 		no++;
 		snprintf(varbuf, sizeof(varbuf), "_SIPADDHEADER%.2d", no);
 
-		if( (pbx_builtin_getvar_helper(chan, (const char *) varbuf) == (const char *) NULL) )
+		/* Compare without the leading underscore */
+		if( (pbx_builtin_getvar_helper(chan, (const char *) varbuf + 1) == (const char *) NULL) )
 			ok = TRUE;
 	}
 	if (ok) {