michael noland d7901307b8 Adding preliminary support for enabling the warning C4244 ('argument': conversion from 'type1' to 'type2', possible loss of data) on a module by module basis to help catch int64->int32 and double->float / float<->int confusion ...

- UnsafeTypeCastWarningLevel can be set to WarningLevel.Warning or WarningLevel.Error in ModuleName.Build.cs (off by default)
- Currently only supported on MS compilers (Clang ignores the setting for now)
#jira UE-86949
#rb ben.marsh


#ROBOMERGE-SOURCE: CL 11050203 via CL 11050250 via CL 11050262
#ROBOMERGE-BOT: (v637-11041722)

[CL 11050266 by michael noland in Main branch]

2020-01-17 13:27:48 -05:00

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