Fix crash when using infinite widgets (#7296)

* Closes https://github.com/emilk/egui/issues/7100

crates/egui/src/hit_test.rs

@@ -91,6 +91,8 @@ pub fn hit_test(
         }
     }
 
+    close.retain(|rect| !rect.interact_rect.any_nan()); // Protect against bad input and transforms
+
     // When using layer transforms it is common to stack layers close to each other.
     // For instance, you may have a resize-separator on a panel, with two
     // transform-layers on either side.