Resize GlWindow

[trimental]

Fixes #32

Resizes the GlWindow

[coveralls]

Pull Request Test Coverage Report for Build 786

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 0.0%

---

Totals
Change from base Build 784:	0.0%
Covered Lines:	0
Relevant Lines:	1454

---

💛 - Coveralls

[fschutt]

Since this only happens on Linux, could you wrap this in a #[cfg(target_os = "linux")]? The reason is that programatically resizing the window might produce bugs on other platforms, so it would be better to target only Linux.

[trimental]

Are you sure? I would say that resizing the GlWindow is a function that glutin expects to be called and not meant to be used just on linux or wayland (although in this case it fixes specifically a linux issue).

Although if you’d rather keep this contained to linux I can change it.

[fschutt]

I can't see any difference between calling it and not calling it on Windows. Calling GlWindow::resize just doesn't do anything (on Windows) and in the worst case could lead to extra jitter during resizing (since the resize should be handled by the window manager, in this case DWM). I also think that this is more or less patching around Linux-specific bugs that should rather be solved in winit / glium - calling GlWindow::resize should not be necessary, winit should do it automatically. But for now it's better that it works at all.