Fix getsockname argument type

Improve "universal" alignment type in struct memdebug

lib/krb5.c

@@ -155,7 +155,7 @@ krb5_auth(void *app_data, struct connectdata *conn)
   char *p;
   const char *host = conn->dns_entry->addr->ai_canonname;
   ssize_t nread;
-  unsigned int l = sizeof(conn->local_addr);
+  socklen_t l = sizeof(conn->local_addr);
   struct SessionHandle *data = conn->data;
   CURLcode result;
   const char *service = "ftp", *srv_host = "host";

lib/memdebug.c

@@ -47,7 +47,10 @@
 
 struct memdebug {
   size_t size;
-  double mem[1];
+  union {
+    double d;
+    void * p;
+  } mem[1];
   /* I'm hoping this is the thing with the strictest alignment
    * requirements.  That also means we waste some space :-( */
 };