ast_malloc is sufficient here, since snprintf is called on the buffer

immediately after it gets allocated, which will automatically NULL terminate
the string


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@38129 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channel.c

@@ -515,7 +515,7 @@ char *ast_state2str(int state)
 	default:
 		pthread_once(&state2str_buf_once, state2str_buf_key_create);
 		if (!(buf = pthread_getspecific(state2str_buf_key))) {
-			if (!(buf = ast_calloc(1, STATE2STR_BUFSIZE)))
+			if (!(buf = ast_malloc(STATE2STR_BUFSIZE)))
 				return NULL;
 			pthread_setspecific(state2str_buf_key, buf);
 		}