Move setlocale from Lua to C++.

src/script/cpp_api/s_base.cpp

@@ -119,6 +119,9 @@ ScriptApiBase::ScriptApiBase() :
 
 	m_environment = NULL;
 	m_guiengine = NULL;
+
+	// Make sure Lua uses the right locale
+	setlocale(LC_NUMERIC, "C");
 }
 
 ScriptApiBase::~ScriptApiBase()

src/script/cpp_api/s_security.cpp

@@ -249,9 +249,8 @@ void ScriptApiSecurity::initializeSecurityClient()
 	static const char *os_whitelist[] = {
 		"clock",
 		"date",
-		"difftime",	
-		"time",
-		"setlocale",
+		"difftime",
+		"time"
 	};
 	static const char *debug_whitelist[] = {
 		"getinfo",