Fix segfault in CLI mode when extruder/filament options absent (P1S profiles) (#13193)

Fix segfault in CLI mode when extruder/filament options absent

When slicing via CLI (--slice) with a BBL printer profile such as the
P1S, update_values_to_printer_extruders and
update_values_to_printer_extruders_for_multiple_filaments dereference
option pointers without checking for nullptr first, causing a SIGSEGV.

Root cause: printer profiles that have different_extruder=true (e.g.
P1S variants) trigger these code paths even in single-extruder CLI
invocations where filament_map, extruder_type, and nozzle_volume_type
options may not be present in the resolved config.

Fix: add null guards before dereferencing option<> / dynamic_cast<>
results, consistent with the pattern used in PR #12719. Log a warning
and return early rather than crashing.

Fixes CLI --slice segfault (exit 139) with P1S profiles.

Related: #12426, #12719

src/libslic3r/PrintApply.cpp

@@ -1163,7 +1163,8 @@ Print::ApplyStatus Print::apply(const Model &model, DynamicPrintConfig new_full_
 
     m_ori_full_print_config = new_full_config;
     new_full_config.update_values_to_printer_extruders_for_multiple_filaments(new_full_config, filament_options_with_variant,  "filament_self_index", "filament_extruder_variant");
-    std::vector<int> filament_maps =  new_full_config.option<ConfigOptionInts>("filament_map")->values;
+    auto opt_filament_map = new_full_config.option<ConfigOptionInts>("filament_map");
+    std::vector<int> filament_maps = opt_filament_map ? opt_filament_map->values : std::vector<int>();
 
     // Find modified keys of the various configs. Resolve overrides extruder retract values by filament profiles.
     DynamicPrintConfig   filament_overrides;