Fix crash in command handling

src/client/component/network.cpp

@@ -27,12 +27,19 @@ namespace network
 			const auto cmd_string = utils::string::to_lower(command);
 			auto& callbacks = get_callbacks();
 			const auto handler = callbacks.find(cmd_string);
+
 			if (handler == callbacks.end())
 			{
 				return false;
 			}
 
 			const auto offset = cmd_string.size() + 5;
+
+			if (message->cursize <= offset)
+			{
+				return false;
+			}
+
 			const std::string_view data(message->data + offset, message->cursize - offset);
 
 			handler->second(*address, data);