- DIRT_GLOBAL_MODIFIER is a global modifier to dirt generation

- second cleaning button in menu now orders entire team to clean their guns
- global overheating modifier now also multiplies attachment modifiers
- cleaning kits always use up 1% on use


git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@5913 3b4a5df2-a311-0410-b5c6-a8a6f20db521

Tactical/Items.cpp

@@ -14702,9 +14702,12 @@ FLOAT GetItemDirtIncreaseFactor( OBJECTTYPE * pObj, BOOLEAN fConsiderAmmo )
 		}
 	}
 
-	// ammo modifies how much dirt a single shot makes, but only while shooting
+	// ammo modifies how much dirt a single shot makes, but only while shooting, not when a gun gets dirty due to environmental effects
 	if ( fConsiderAmmo )		
 		dirtincreasefactor *= (1.0f + AmmoTypes[(*pObj)[0]->data.gun.ubGunAmmoType].dirtModificator);
+
+	// multiply again for global modifer
+	dirtincreasefactor *= gGameExternalOptions.iDirtGlobalModifier;
 		
 	// dirt factor has to be >= 0 (items don't clean themselves)
 	dirtincreasefactor = max(0.0f, dirtincreasefactor);