Update Bluewing Server to build 18

Fixed lw_stream close hook incorrectly being freed directly. That might've been crash potential in server, or may not have come into play at all, judging from it never occuring when the debug version of build 17 was run on a live server with 50-100 clients for several hours, while CRT memory checks were enabled.
The rest of build 18 fixes don't apply in this standalone version.
For ease of mind for anyone concerned, I'll update ansi-final to build 18.

Author: SortaCore

Lacewing/Lacewing.h

@@ -1641,7 +1641,7 @@ struct relayclientinternal;
 struct relayclient
 {
 public:
-	const static int buildnum = 83;
+	const static int buildnum = 85;
 
 	void * internaltag = nullptr, *tag = nullptr;
 
@@ -1847,7 +1847,7 @@ namespace lacewing {
 struct relayserverinternal;
 struct relayserver
 {
-	static const int buildnum = 17;
+	static const int buildnum = 18;
 
 	void * internaltag, * tag = nullptr;
 

Lacewing/src/stream.c

@@ -1245,7 +1245,6 @@ void lw_stream_remove_hook_close (lw_stream stream,
 	{
 	  if (hook->proc == proc && hook->tag == tag)
 	  {
-		 free(hook);
 		 list_elem_remove (hook);
 		 found = lw_true;
 		 break;