Merge branch 'master' into gonesolong

Conflicts:
	src/CMakeLists.txt
	src/b_think.cpp
	src/g_doom/a_doomweaps.cpp
	src/g_hexen/a_clericstaff.cpp
	src/g_hexen/a_fighterplayer.cpp
	src/namedef.h
	src/p_enemy.cpp
	src/p_local.h
	src/p_mobj.cpp
	src/p_teleport.cpp
	src/sc_man_tokens.h
	src/thingdef/thingdef_codeptr.cpp
	src/thingdef/thingdef_function.cpp
	src/thingdef/thingdef_parse.cpp
	wadsrc/static/actors/actor.txt
	wadsrc/static/actors/constants.txt
	wadsrc/static/actors/shared/inventory.txt

- Added register reuse to VMFunctionBuilder for FxPick's code emitter.
- Note to self: Need to reimplement IsPointerEqual and CheckClass, which
  were added to thingdef_function.cpp over the past year, as this file no
  longer exists in this branch.

src/thingdef/thingdef_exp.cpp

@@ -369,6 +369,37 @@ static FxExpression *ParseExpression0 (FScanner &sc, PClassActor *cls)
 
 		return new FxRandom(rng, min, max, sc);
 	}
+	else if (sc.CheckToken(TK_Pick))
+	{
+		FRandom *rng;
+		TArray<FxExpression*> list;
+		list.Clear();
+		int index = 0;
+
+		if (sc.CheckToken('['))
+		{
+			sc.MustGetToken(TK_Identifier);
+			rng = FRandom::StaticFindRNG(sc.String);
+			sc.MustGetToken(']');
+		}
+		else
+		{
+			rng = &pr_exrandom;
+		}
+		sc.MustGetToken('(');
+
+		while (!(sc.CheckToken(')')))
+		{
+			FxExpression *min = ParseExpressionM(sc, cls);
+			list.Push(min);
+			if (sc.CheckToken(')'))
+				break;
+			else
+				sc.MustGetToken(',');
+		}
+
+		return new FxPick(rng, list, sc);
+	}
 	else if (sc.CheckToken(TK_FRandom))
 	{
 		FRandom *rng;