Fixed dumb mime.core mistake and final POSIX update.

Author: danielga

source/mime.cpp

@@ -15,8 +15,7 @@ GMOD_MODULE_OPEN( )
 
 GMOD_MODULE_CLOSE( )
 {
-	if( luaopen_mime_core( LUA->state ) == 1 )
-		LUA->SetField( GarrysMod::Lua::INDEX_GLOBAL, "mime" );
-
+	LUA->PushNil( );
+	LUA->SetField( GarrysMod::Lua::INDEX_GLOBAL, "mime" );
 	return 0;
 }

source/serial.cpp

@@ -9,8 +9,8 @@ GMOD_MODULE_OPEN( )
 
 	if( luaopen_socket_serial( LUA->state ) == 1 )
 	{
-		lua_replace( state, 1 );
-		lua_settop( state, 1 );
+		lua_replace( LUA->state, 1 );
+		lua_settop( LUA->state, 1 );
 		LUA->Push( -1 );
 		LUA->SetField( -3, "serial" );
 	}

source/unix.cpp

@@ -9,8 +9,8 @@ GMOD_MODULE_OPEN( )
 
 	if( luaopen_socket_unix( LUA->state ) == 1 )
 	{
-		lua_replace( state, 1 );
-		lua_settop( state, 1 );
+		lua_replace( LUA->state, 1 );
+		lua_settop( LUA->state, 1 );
 		LUA->Push( -1 );
 		LUA->SetField( -3, "unix" );
 	}