Changed sneak_success to call is_pc_sneak_working_ engine function, which takes player's current sneaking status into account as well, instead of only returning the result of last sneak attempt.

artifacts/scripting/sfall function notes.txt

@@ -299,8 +299,8 @@ Some utility/math functions are available:
 - Additional game msg files added by ExtraGameMsgFileList setting will have consecutive fileIds assigned beginning from 0x2000. (e.g. if you set ExtraGameMsgFileList=foo,bar in ddraw.ini, foo.msg will be associated with 0x2000 and bar.msg with 0x2001.)
 
 > int sneak_success
-- returns 1 if last sneak attempt (roll against skill) was successful, 0 otherwise
-- this is an internal engine variable wich is used to determine the perception range of critters (which you can override using HOOK_WITHINPERCEPTION)
+- returns 1 if the player is currently sneaking, and last sneak attempt (roll against skill) was successful; 0 otherwise
+- this calls an internal engine function which is used to determine the perception range of critters (which you can override using HOOK_WITHINPERCEPTION)
 
 > int tile_light(int elevation, int tileNum)
 - returns light intensity at the given tile in range from 0 to 65535

sfall/FalloutEngine/Functions_def.h

@@ -41,6 +41,7 @@ WRAP_WATCOM_FUNC1(Window*, GNW_find, long, winRef)
 WRAP_WATCOM_FUNC0(long, intface_is_item_right_hand)
 WRAP_WATCOM_FUNC0(void, intface_toggle_item_state)
 WRAP_WATCOM_FUNC0(void, intface_use_item)
+WRAP_WATCOM_FUNC0(long, is_pc_sneak_working)
 WRAP_WATCOM_FUNC1(long, item_w_max_ammo, GameObject*, item)
 WRAP_WATCOM_FUNC1(long, item_w_curr_ammo, GameObject*, item)
 WRAP_WATCOM_FUNC1(long, item_weight, GameObject*, item)

sfall/Modules/Scripting/Handlers/Misc.cpp

@@ -1708,7 +1708,7 @@ end:
 }
 
 void sf_sneak_success(OpcodeContext& ctx) {
-	ctx.setReturn(static_cast<int>(fo::var::sneak_working));
+	ctx.setReturn(fo::func::is_pc_sneak_working());
 }
 
 void sf_tile_light(OpcodeContext& ctx) {