Fix memory errors

- read_line: OOB write when a line in /proc/modules contains a
   terminating character at size position.
 - handle_view_created: Ensure that the list_t returned by criteria_for
   is free'd after use
 - ipc_event_binding_keyboard/ipc_event_binding: Properly handle
   json_object reference counting and ownership.

common/readline.c

@@ -36,7 +36,7 @@ char *read_line(FILE *file) {
 		}
 		string[length++] = c;
 	}
-	if (length + 1 == size) {
+	if (length + 1 >= size) {
 		char *new_string = realloc(string, length + 1);
 		if (!new_string) {
 			free(string);