Say an "intruder" voice dialogue for trespassing crimes (Fixes #1082)

Seems to be broken in the original engine, but according to the TES-CS help this is how the intruder voices should be used. There are legitimate entries for "intruder" in the game's files, so we might as well use them.

apps/openmw/mwbase/mechanicsmanager.hpp

@@ -113,7 +113,7 @@ namespace MWBase
                 OT_Theft, // Taking items owned by an NPC or a faction you are not a member of
                 OT_Assault, // Attacking a peaceful NPC
                 OT_Murder, // Murdering a peaceful NPC
-                OT_Trespassing, // Staying in a cell you are not allowed in (where is this defined?)
+                OT_Trespassing, // Picking the lock of an owned door/chest
                 OT_SleepingInOwnedBed, // Sleeping in a bed owned by an NPC or a faction you are not a member of
                 OT_Pickpocket // Entering pickpocket mode, leaving it, and being detected. Any items stolen are a separate crime (Theft)
             };

apps/openmw/mwmechanics/mechanicsmanagerimp.cpp

@@ -955,6 +955,8 @@ namespace MWMechanics
             {
                 if (type == OT_Theft || type == OT_Pickpocket)
                     MWBase::Environment::get().getDialogueManager()->say(*it, "thief");
+                else if (type == OT_Trespassing)
+                    MWBase::Environment::get().getDialogueManager()->say(*it, "intruder");
 
                 // Crime reporting only applies to NPCs
                 if (!it->getClass().isNpc())