Can we try not to assign an unsigned int to -1?

(closes issue #14074)
Reported by: wetwired


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@164204 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_dial.c

@@ -876,7 +876,7 @@ static int dial_exec_full(struct ast_channel *chan, void *data, struct ast_flags
 	char numsubst[256];
 	char cidname[AST_MAX_EXTENSION] = "";
 	int privdb_val = 0;
-	unsigned int calldurationlimit = -1;
+	int calldurationlimit = -1;
 	long timelimit = 0;
 	long play_warning = 0;
 	long warning_freq = 0;