Fixed missing case: in entity damaging crashin the server (#4899)

* made snow golems not crashing the server anymore

* changed damage type to environment

* updated damage in API dopcumentation and changed enderman damage type

* removed incidental d in the code

* added dtEnvironment to ArmorCoversAgainst

Co-authored-by: 12xx12 <12xx12100@gmail.com>
Co-authored-by: Alexander Harkness <me@bearbin.net>

src/Entities/Entity.cpp

@@ -635,6 +635,7 @@ bool cEntity::ArmorCoversAgainst(eDamageType a_DamageType)
 		case dtFalling:
 		case dtLightning:
 		case dtPlugin:
+		case dtEnvironment:
 		{
 			return false;
 		}