BasicType BasicType::FLOAT("float");
BasicType BasicType::DOUBLE("double");
-StringType* StringType::_instance = 0;
-HSQUIRRELVMType* HSQUIRRELVMType::_instance = 0;
+StringType* StringType::_instance = NULL;
+HSQUIRRELVMType* HSQUIRRELVMType::_instance = NULL;
+SQIntegerType* SQIntegerType::_instance = NULL;