Fixed map lighting from Night Vision perk

* Before the perk effect only kicked in when map update proc ran after
game load. Now the delay is much shorter.

sfall/FalloutEngine/FunctionOffsets_def.h

@@ -2019,6 +2019,7 @@ FUNC(light_get_tile_true_,            0x47A9C4)
 FUNC(light_increase_ambient_,         0x47A900)
 FUNC(light_init_,                     0x47A8F0)
 FUNC(light_reset_tiles_,              0x47AA84)
+FUNC(light_set_ambient_,              0x47A908)
 FUNC(light_set_tile_,                 0x47A9EC)
 FUNC(light_subtract_from_tile_,       0x47AA48)
 FUNC(lighten_buf_,                    0x4D3A48)

sfall/FalloutEngine/Functions_def.h

@@ -178,6 +178,7 @@ WRAP_WATCOM_FUNC1(long, item_w_secondary_mp_cost, fo::GameObject*, item)
 WRAP_WATCOM_FUNC2(long, item_w_subtype, fo::GameObject*, item, long, hitMode)
 WRAP_WATCOM_FUNC1(long, item_weight, fo::GameObject*, item)
 WRAP_WATCOM_FUNC2(long, light_get_tile, long, elevation, long, tileNum) // Returns light level at given tile
+WRAP_WATCOM_FUNC2(void, light_set_ambient, long, intensity, long, isRefresh)
 WRAP_WATCOM_FUNC2(long, load_frame, const char*, fileName, fo::FrmFile**, frmPtr)
 WRAP_WATCOM_FUNC4(BYTE*, loadPCX, const char*, fileName, long*, width, long*, height, BYTE*, palette)
 WRAP_WATCOM_FUNC1(fo::Program*, loadProgram, const char*, fileName)

sfall/Modules/ScriptExtender.cpp

@@ -530,6 +530,8 @@ static void InitGlobalScripts() {
 
 	HookScripts::InitHookScripts();
 	LoadGlobalScriptsList();
+	// Fix map lighting from Night Vision perk when loading a saved game
+	fo::func::light_set_ambient(fo::var::ambient_light, 1); // refresh map lighting
 
 	isGlobalScriptLoading = 0;
 }