Unchecked malloc in atoe.c

[daveyc]

Unchecked malloc and strdup.

		/* Add a new entry to the list */
		prev->next = (envvar_t *)malloc(sizeof(envvar_t));
		envvar = prev->next;
		envvar->next = NULL;
		envvar->name = strdup(name);
		envvar->value = strdup(value);