Ignore unused variable warnings

test/testpaint/main.cpp

@@ -263,7 +263,9 @@ static bool openrct2_setup_rct2_segment()
 	// necessary. Windows does not need to do this as OpenRCT2 runs as a DLL loaded from the Windows PE.
 	int len = 0x01429000 - 0x8a4000; // 0xB85000, 12079104 bytes or around 11.5MB
 	int err = 0;
-
+    // in some configurations err and len may be unused
+    UNUSED(err);
+    UNUSED(len);
 #if defined(__unix__)
 	int pageSize = getpagesize();
 	int numPages = (len + pageSize - 1) / pageSize;