(#24385) tomlplusplus: Fix exception option handling

* Fix expection option handling

* Fix optional optionon value check

recipes/tomlplusplus/all/conanfile.py

@@ -79,6 +79,8 @@ def package_info(self):
         self.cpp_info.set_property("cmake_target_name", "tomlplusplus::tomlplusplus")
         self.cpp_info.bindirs = []
         self.cpp_info.libdirs = []
-        if self.options.exceptions.value is not None:
+        # Casting as a String because None value would not be properly handled, this is a PackageOption, not the value itself
+        # which `is` never None
+        if str(self.options.exceptions) != "None":
             define_value = "1" if self.options.exceptions is True else "0"
             self.cpp_info.defines.append(f"TOML_EXCEPTIONS={define_value}")