Copy structs without memcpy.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>
Reviewed-by: Nelson Elhage <nelhage@mit.edu>

message.c

@@ -750,7 +750,7 @@ void owl_message_create_from_znotice(owl_message *m, const ZNotice_t *n)
   owl_message_set_direction_in(m);
 
   /* first save the full notice */
-  memcpy(&(m->notice), n, sizeof(ZNotice_t));
+  m->notice = *n;
 
   /* a little gross, we'll replace \r's with ' ' for now */
   owl_zephyr_hackaway_cr(&(m->notice));

messagelist.c

@@ -84,7 +84,7 @@ int owl_messagelist_expunge(owl_messagelist *ml)
   owl_list_cleanup(&(ml->list), NULL);
 
   /* copy the new list to the old list */
-  memcpy(&(ml->list), &newlist, sizeof(owl_list));
+  ml->list = newlist;
 
   return(0);
 }

variable.c

@@ -465,7 +465,7 @@ int owl_variable_dict_setup(owl_vardict *vd) {
   if (owl_dict_create(vd)) return(-1);
   for (var = variables_to_init; var->name != NULL; var++) {
     cur = owl_malloc(sizeof(owl_variable));
-    memcpy(cur, var, sizeof(owl_variable));
+    *cur = *var;
     switch (cur->type) {
     case OWL_VARIABLE_OTHER:
       cur->set_fn(cur, cur->pval_default);