AstGen: disallow '-0' integer literal

The intent here is ambiguous: this resolves to the comptime_int '0', but
it's likely the user meant to use a floating-point literal.

Resolves: #16890
283afb50b5mlugg committed on 8/21/2023, 8:47:31 AM· committed by Veikka Tuominenparent411462e
5 files changedLine totals unavailable