app_queue: Don't be quite so aggressive in initializing the array

We only need the first character.
........

Merged revisions 399695 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@399696 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_queue.c

@@ -5910,10 +5910,12 @@ static void setup_mixmonitor(struct queue_ent *qe, const char *filename)
 	char escaped_filename[256];
 	char file_with_ext[256];
 	char mixmonargs[1512];
-	char escaped_monitor_exec[1024] = "\0";
+	char escaped_monitor_exec[1024];
 	const char *monitor_options;
 	const char *monitor_exec;
 
+	escaped_monitor_exec[0] = '\0';
+
 	if (filename) {
 		escape_and_substitute(qe->chan, filename, escaped_filename, sizeof(escaped_filename));
 	} else {