Added DontSaveObject script instruction

We are ignoring it for now and unless users protest we will probably keep it that way.

apps/openmw/mwscript/docs/vmformat.txt

@@ -146,4 +146,5 @@ op 0x200014f: ForceGreeting
 op 0x2000150: ForceGreeting, explicit reference
 op 0x2000151: ToggleFullHelp
 op 0x2000152: Goodbye
+op 0x2000153: DontSaveObject (left unimplemented)
 opcodes 0x2000154-0x3ffffff unused

apps/openmw/mwscript/miscextensions.cpp

@@ -194,6 +194,17 @@ namespace MWScript
                 }
         };
 
+        class OpDontSaveObject : public Interpreter::Opcode0
+        {
+            public:
+
+                virtual void execute (Interpreter::Runtime& runtime)
+                {
+                    // We are ignoring the DontSaveObject statement for now. Probably not worth
+                    /// bothering with. The incompatibility we are creating should be marginal at most.
+                }
+        };
+
         const int opcodeXBox = 0x200000c;
         const int opcodeOnActivate = 0x200000d;
         const int opcodeActivate = 0x2000075;
@@ -208,6 +219,7 @@ namespace MWScript
         const int opcodeFadeTo = 0x200013e;
         const int opcodeToggleWater = 0x2000144;
         const int opcodeTogglePathgrid = 0x2000146;
+        const int opcodeDontSaveObject = 0x2000153;
 
         void registerExtensions (Compiler::Extensions& extensions)
         {
@@ -229,6 +241,7 @@ namespace MWScript
             extensions.registerInstruction ("twa", "", opcodeToggleWater);
             extensions.registerInstruction ("togglepathgrid", "", opcodeTogglePathgrid);
             extensions.registerInstruction ("tpg", "", opcodeTogglePathgrid);
+            extensions.registerInstruction ("dontsaveobject", "", opcodeDontSaveObject);
         }
 
         void installOpcodes (Interpreter::Interpreter& interpreter)
@@ -247,6 +260,7 @@ namespace MWScript
             interpreter.installSegment5 (opcodeFadeTo, new OpFadeTo);
             interpreter.installSegment5 (opcodeTogglePathgrid, new OpTogglePathgrid);
             interpreter.installSegment5 (opcodeToggleWater, new OpToggleWater);
+            interpreter.installSegment5 (opcodeDontSaveObject, new OpDontSaveObject);
         }
     }
 }