Missing param description in RoundFloatToPrecision

Missing changelog entry about changes to FileOpen cause they came up with VW

Author: garethyr

CHANGELOG.md

@@ -851,6 +851,8 @@ This can be accessed via the new Lua (R/W) `SettingsMan` property `AIUpdateInter
 
 - New `Activity` Lua function `activity:SetPlayerHadBrain(player, whetherOrNotPlayerHadBrain)`, which sets whether or not the given player had a brain. Probably mostly useful for dealing with loading a game with multiple players, where one player is dead and you have to sort out brain assignment.
 
+- Changed `LuaMan:FileOpen` access modes so it only allows `"r", "r+", "w", "w+", "a", "a+"`, i.e. specifying type (text, binary) is not supported. See [this reference page](https://cplusplus.com/reference/cstdio/fopen) for details on the access modes.
+
 </details>
 
 <details><summary><b>Fixed</b></summary>

System/RTETools.h

@@ -145,6 +145,7 @@ namespace RTE {
 	/// Rounds a float to a set fixed point precision (digits after decimal point) with option to always ceil or always floor the remainder.
 	/// </summary>
 	/// <param name="inputFloat">The input float to round.</param>
+	/// <param name="precision">The precision to round to, i.e. the number of digits after the decimal points.</param>
 	/// <param name="roundingMode">Method of rounding to use. 0 for system default, 1 for floored remainder, 2 for ceiled remainder.</param>
 	/// <returns>A string of the float, rounded and displayed to chosen precision.</returns>
 	std::string RoundFloatToPrecision(float input, int precision, int roundingMode = 0);