engine: moved link_t helpers to sv_world.c from world.c and made them static

engine/server/sv_world.c

@@ -358,6 +358,53 @@ static hull_t *SV_HullForStudioModel( edict_t *ent, vec3_t mins, vec3_t maxs, ve
 	return SV_HullForEntity( ent, mins, maxs, offset );
 }
 
+/*
+===============================================================================
+
+	ENTITY LINKING
+
+===============================================================================
+*/
+/*
+===============
+ClearLink
+
+ClearLink is used for new headnodes
+===============
+*/
+static void ClearLink( link_t *l )
+{
+	l->prev = l->next = l;
+}
+
+/*
+===============
+RemoveLink
+
+remove link from chain
+===============
+*/
+static void RemoveLink( link_t *l )
+{
+	l->next->prev = l->prev;
+	l->prev->next = l->next;
+}
+
+/*
+===============
+InsertLinkBefore
+
+kept trigger and solid entities seperate
+===============
+*/
+static void InsertLinkBefore( link_t *l, link_t *before )
+{
+	l->next = before;
+	l->prev = before->prev;
+	l->prev->next = l;
+	l->next->prev = l;
+}
+
 /*
 ===============================================================================