Fix crash on windows when window is minimized

src/app/common.rs

@@ -58,6 +58,7 @@ pub struct WindowState {
     pub surface_desc: wgpu::SurfaceConfiguration,
     pub surface: wgpu::Surface<'static>,
     pub hidpi_factor: f64,
+    pub minimized: bool,
 }
 
 impl WindowState {
@@ -105,6 +106,7 @@ impl WindowState {
             surface_desc,
             surface,
             hidpi_factor,
+            minimized: false,
         }
     }
 
@@ -114,9 +116,14 @@ impl WindowState {
     }
 
     pub fn handle_resize(&mut self, size: &PhysicalSize<u32>) {
-        self.surface_desc.width = size.width;
-        self.surface_desc.height = size.height;
-        self.surface.configure(&self.device, &self.surface_desc);
+        if size.width > 0 && size.height > 0 {
+            self.minimized = false;
+            self.surface_desc.width = size.width;
+            self.surface_desc.height = size.height;
+            self.surface.configure(&self.device, &self.surface_desc);
+        } else {
+            self.minimized = true;
+        }
     }
 }