[BUG] MeasureTextEx() causes access violation

[evgTSV]

Describe the bug
While calling MeasureTextEx() before window init, the application crashes with 0xC0000005 (Access Violation). I think, we need to catch this.

To Reproduce

open Raylib_CSharp.Fonts
open type Raylib_CSharp.Fonts.TextManager

let text = "Label default"
let size = 20.0f
let textMeasure =
    MeasureTextEx(Font.GetDefault(), text, size, 1f)
    
printf $"Text measure: {textMeasure.X}, {textMeasure.Y}"

Expected behavior
More informative error or Vector2.Zero

Screenshots

Desktop (please complete the following information):

• OS: Win11
• Version 5.0.0

[MrScautHD]

looks like the method is wrong wrapped, feel free to fix that.