Exit with fatal error if any included INI files do not exist

Author: Starkku

docs/Whats-New.md

@@ -21,6 +21,7 @@ You can use the migration utility (can be found on [Phobos supplementaries repo]
 
 #### From post-0.3 devbuilds
 
+- Game will now produce fatal error with an error message if any of the files listed in `[$Include]` in any INI file do not exist.
 - Aircraft with weapons that have `Strafing.Shots` < 5 will now keep flying after last shot like those with `Strafing.Shots` >= 5 do. This delay can now be customized explicitly by setting `Strafing.EndDelay` on the weapon.
 - Selecting weapons other than primary against walls based on `Wall=true` on Warhead etc. now requires `[CombatDamage] -> AllowWeaponSelectAgainstWalls` to be set to true first.
 - Lunar theater tileset parsing unhardcoding is now only applied if `lunarmd.ini` has `[General] -> ApplyLunarFixes` set to true.

src/Misc/Hooks.INIInheritance.cpp

@@ -248,6 +248,8 @@ DEFINE_HOOK(0x474230, CCINIClass_Load_Inheritance, 0x5)
 		CCFileClass file (node.Data->Value);
 		if (file.Exists())
 			INIInheritance::LastINIFile->ReadCCFile(&file, false, false);
+		else
+			Debug::FatalErrorAndExit("Included INI file %s does not exist", node.Data->Value);
 	}
 
 	return 0;