common: document Equipment.ZoomLevel (#118)

Author: markus-wa

common/equipment.go

@@ -268,7 +268,7 @@ type Equipment struct {
 	AmmoInMagazine int              // Amount of bullets in the weapon's magazine
 	AmmoReserve    int              // Amount of reserve bullets
 	OriginalString string           // E.g. 'models/weapons/w_rif_m4a1_s.mdl'. Used internally to differentiate alternative weapons (M4A4 / M4A1-S etc.).
-	ZoomLevel      int
+	ZoomLevel      int              // How far the player has zoomed in on the weapon. 0=no zoom, 1=first level, 2=maximum zoom
 
 	uniqueID int64
 }