msvc-14.29-x64_unity_xtra warnings for Arx in branch 1.2.1

• C4201 (1)
• C4324 (2)
• C4459 (3)
• C4996 (9)
• C4456 (76)
• C4244 (92)
• C4267 (279)
• C4127 (404)