Fix warnings in Visual Studio examples due to variables with wrong type

Author: svedi

examples/VisualStudio/Example_Activate/Example_Activate.cpp

@@ -43,7 +43,7 @@ int main()
 			std::cout << "SKM error: " << e.get_reason() << std::endl;
 		}
 		else if (e.get_subsystem() == Subsystem::RequestHandler) {
-			int code = e.get_extra();
+			size_t code = e.get_extra();
 			std::cout << "Error connecting to the server: error code: " << code << std::endl;
 		}
 		else {

examples/VisualStudio/Example_Floating/Example_Floating.cpp

@@ -47,7 +47,7 @@ void activate(char const* machine_code)
 			std::cout << "Cryptolens error: " << e.get_reason() << std::endl;
 		}
 		else if (e.get_subsystem() == Subsystem::RequestHandler) {
-			int code = e.get_extra();
+			size_t code = e.get_extra();
 			std::cout << "Error connecting to the server: error code: " << code << std::endl;
 		}
 		else {

examples/VisualStudio/Example_Offline/Example_Offline.cpp

@@ -80,7 +80,7 @@ int write_license_key_to_file(LPCWSTR file_name)
 			std::cout << "Cryptolens error: " << e.get_reason() << std::endl;
 		}
 		else if (e.get_subsystem() == Subsystem::RequestHandler) {
-			int code = e.get_extra();
+			size_t code = e.get_extra();
 			std::cout << "Error connecting to the server: error code: " << code << std::endl;
 		}
 		else {