wm: teppich

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tidy lladd, add lldel

--- a/libc/lladd.c

+++ b/libc/lladd.c

@@ -11,9 +11,7 @@

 	temp->next = nil;

 	if(last->next != nil)

-	{

 		return LL_ERR;

-	}

 	last->next = temp;

 	return OK;

--- a/libc/lldel.c

+++ b/libc/lldel.c

@@ -1,0 +1,12 @@

+/* deletes the next entry in the list */

+int

+lldel(ll_t *ll)

+{

+	ll_t *temp = ll->next;

+	if(ll->next != nil)

+		return LL_ERR;

+

+	ll->next = ll->next->next;

+	free(temp);

+	return OK;

+}