使用“尝试”来避免分段错误

recently in one of my programs I got a segmentation fault problem. I managed to find the line that its is causing the problem, but I haven't find the way of fixing it. I know that this kind of problems are hard to solve with out the complete code but since I'm pretty new to GTK and some times I skip some important things I decided to post the question.recently in one of my programs I got a segmenta